Follow the task and return only the requested answer, without explanation or Markdown fences.
Parse the complete program into its neutral JSON abstract syntax tree.
Preserve every node, parent-child relationship, statement order, scope kind and name, variable and value, and nop payload.
Do not evaluate bindings or discard shadowed bindings or nop statements.
The root is a JSON object with exactly one field, body, containing an ordered array of statements.
A scope node has exactly these fields: {"type":"scope","kind":"func","name":"n_abcdefgh","body":[]}.
Its kind is the semantic category unit, func, or area, using the mapping in SYNTAX even when the input keywords differ.
A binding node has exactly these fields: {"type":"let","variable":"x_a","value":1739}.
A nop node has exactly these fields: {"type":"nop","payload":"p_abcdefgh"}.
Use the actual names, variables, integer values and payloads from the input, not these illustrative schema values.
Closing lines determine the end of a scope body and do not create AST nodes.
Object field order and whitespace may vary; body-array order must match the source statement order.
Return only the complete JSON AST, without Markdown fences or explanation.

SYNTAX
The kind keywords are xaru for unit, telo for func, and gupi for area. Each creates a local scope.
Open a block with KIND NAME on one line.
Close the innermost open block with nix on its own line.
KIND is one of xaru, telo, gupi; NAME is n_ followed by exactly eight lowercase letters and is unique in the program.
A binding statement (let) is sem VARIABLE VALUE. VARIABLE is x_ followed by one letter a through f; VALUE is a four digit integer from 1000 through 9999.
Within one scope a variable is bound at most once. Inner bindings hide outer bindings until their scope closes.
A no-effect statement (nop) is bov PAYLOAD. PAYLOAD is p_ followed by eight lowercase letters.
The observation marker is probe PROBE_ID VARIABLE. PROBE_ID is q_ followed by eight lowercase letters.
Use one statement per line. Indentation has no meaning; scope is determined solely by explicit opening and closing lines.

EXAMPLES
Example 1
Program:
sem x_b 1898
sem x_a 9018
gupi n_imcgrbkz
sem x_a 7207
bov p_qdggfdxg
nix
gupi n_kamcsxht
sem x_a 8346
telo n_iqloaety
sem x_a 7330
bov p_eeughnii
nix
xaru n_zsweikhp
sem x_a 5661
nix
nix
AST:
{"body":[{"type":"let","value":1898,"variable":"x_b"},{"type":"let","value":9018,"variable":"x_a"},{"body":[{"type":"let","value":7207,"variable":"x_a"},{"payload":"p_qdggfdxg","type":"nop"}],"kind":"area","name":"n_imcgrbkz","type":"scope"},{"body":[{"type":"let","value":8346,"variable":"x_a"},{"body":[{"type":"let","value":7.33E+3,"variable":"x_a"},{"payload":"p_eeughnii","type":"nop"}],"kind":"func","name":"n_iqloaety","type":"scope"},{"body":[{"type":"let","value":5661,"variable":"x_a"}],"kind":"unit","name":"n_zsweikhp","type":"scope"}],"kind":"area","name":"n_kamcsxht","type":"scope"}]}

Example 2
Program:
sem x_b 6809
sem x_a 8528
gupi n_cltuwgfr
sem x_a 7436
bov p_jnevfcow
nix
telo n_hjmowkks
telo n_xgsdplot
sem x_a 1433
bov p_fsvjabvb
nix
gupi n_prnbhatf
sem x_a 4859
telo n_xgfwoefi
sem x_a 9856
bov p_bipumgzk
nix
nix
nix
AST:
{"body":[{"type":"let","value":6809,"variable":"x_b"},{"type":"let","value":8528,"variable":"x_a"},{"body":[{"type":"let","value":7436,"variable":"x_a"},{"payload":"p_jnevfcow","type":"nop"}],"kind":"area","name":"n_cltuwgfr","type":"scope"},{"body":[{"body":[{"type":"let","value":1433,"variable":"x_a"},{"payload":"p_fsvjabvb","type":"nop"}],"kind":"func","name":"n_xgsdplot","type":"scope"},{"body":[{"type":"let","value":4859,"variable":"x_a"},{"body":[{"type":"let","value":9856,"variable":"x_a"},{"payload":"p_bipumgzk","type":"nop"}],"kind":"func","name":"n_xgfwoefi","type":"scope"}],"kind":"area","name":"n_prnbhatf","type":"scope"}],"kind":"func","name":"n_hjmowkks","type":"scope"}]}

Example 3
Program:
sem x_b 4546
sem x_a 4315
telo n_qadbgcyx
sem x_a 6944
bov p_ojcebpfp
nix
gupi n_rhfrcekw
sem x_a 4379
gupi n_ackhjhth
sem x_a 4681
bov p_kiumvlki
nix
telo n_pxnqtsdg
sem x_a 5179
telo n_fjetgddq
sem x_a 1459
telo n_nmzxtisc
sem x_a 9594
bov p_jfpamrpj
bov p_rgdikjut
nix
nix
nix
nix
AST:
{"body":[{"type":"let","value":4546,"variable":"x_b"},{"type":"let","value":4315,"variable":"x_a"},{"body":[{"type":"let","value":6944,"variable":"x_a"},{"payload":"p_ojcebpfp","type":"nop"}],"kind":"func","name":"n_qadbgcyx","type":"scope"},{"body":[{"type":"let","value":4379,"variable":"x_a"},{"body":[{"type":"let","value":4681,"variable":"x_a"},{"payload":"p_kiumvlki","type":"nop"}],"kind":"area","name":"n_ackhjhth","type":"scope"},{"body":[{"type":"let","value":5179,"variable":"x_a"},{"body":[{"type":"let","value":1459,"variable":"x_a"},{"body":[{"type":"let","value":9594,"variable":"x_a"},{"payload":"p_jfpamrpj","type":"nop"},{"payload":"p_rgdikjut","type":"nop"}],"kind":"func","name":"n_nmzxtisc","type":"scope"}],"kind":"func","name":"n_fjetgddq","type":"scope"}],"kind":"func","name":"n_pxnqtsdg","type":"scope"}],"kind":"area","name":"n_rhfrcekw","type":"scope"}]}

Example 4
Program:
sem x_b 5207
sem x_a 3885
xaru n_ktlkverx
sem x_a 6602
bov p_gslvtmzu
nix
telo n_qoirzpkk
xaru n_fkzkdvuv
sem x_a 7615
bov p_ryjhouhq
nix
gupi n_ukyxkutx
sem x_a 1895
bov p_svnicwdv
bov p_ebipavym
bov p_reqpqjrs
nix
nix
AST:
{"body":[{"type":"let","value":5207,"variable":"x_b"},{"type":"let","value":3885,"variable":"x_a"},{"body":[{"type":"let","value":6602,"variable":"x_a"},{"payload":"p_gslvtmzu","type":"nop"}],"kind":"unit","name":"n_ktlkverx","type":"scope"},{"body":[{"body":[{"type":"let","value":7615,"variable":"x_a"},{"payload":"p_ryjhouhq","type":"nop"}],"kind":"unit","name":"n_fkzkdvuv","type":"scope"},{"body":[{"type":"let","value":1895,"variable":"x_a"},{"payload":"p_svnicwdv","type":"nop"},{"payload":"p_ebipavym","type":"nop"},{"payload":"p_reqpqjrs","type":"nop"}],"kind":"area","name":"n_ukyxkutx","type":"scope"}],"kind":"func","name":"n_qoirzpkk","type":"scope"}]}

Example 5
Program:
sem x_b 2766
sem x_a 1610
telo n_gfudixmw
sem x_a 2935
bov p_kvlbgeik
nix
xaru n_gxfollqb
sem x_a 9814
gupi n_cpzveext
sem x_a 4727
bov p_vohnzzvv
nix
telo n_cionriid
sem x_a 7140
telo n_lyhdpyzi
sem x_a 4247
bov p_bmzkvnzq
bov p_zdaufrur
bov p_zboxlivj
bov p_xliowxqj
nix
nix
nix
AST:
{"body":[{"type":"let","value":2766,"variable":"x_b"},{"type":"let","value":1.61E+3,"variable":"x_a"},{"body":[{"type":"let","value":2935,"variable":"x_a"},{"payload":"p_kvlbgeik","type":"nop"}],"kind":"func","name":"n_gfudixmw","type":"scope"},{"body":[{"type":"let","value":9814,"variable":"x_a"},{"body":[{"type":"let","value":4727,"variable":"x_a"},{"payload":"p_vohnzzvv","type":"nop"}],"kind":"area","name":"n_cpzveext","type":"scope"},{"body":[{"type":"let","value":7.14E+3,"variable":"x_a"},{"body":[{"type":"let","value":4247,"variable":"x_a"},{"payload":"p_bmzkvnzq","type":"nop"},{"payload":"p_zdaufrur","type":"nop"},{"payload":"p_zboxlivj","type":"nop"},{"payload":"p_xliowxqj","type":"nop"}],"kind":"func","name":"n_lyhdpyzi","type":"scope"}],"kind":"func","name":"n_cionriid","type":"scope"}],"kind":"unit","name":"n_gxfollqb","type":"scope"}]}

Example 6
Program:
sem x_b 4691
sem x_a 6106
xaru n_ndmozqvz
sem x_a 8715
bov p_dzpekxyv
nix
xaru n_jjeqyguo
sem x_a 7168
gupi n_ebmmneso
sem x_a 5166
bov p_xkunojzw
nix
telo n_muypqkhe
telo n_iimjvvgl
sem x_a 1537
xaru n_mfuypmsh
sem x_a 2852
bov p_ulxdbrhn
bov p_pjpriolj
bov p_bytfzykt
bov p_cgvpkfje
bov p_risqwuuh
nix
nix
nix
nix
AST:
{"body":[{"type":"let","value":4691,"variable":"x_b"},{"type":"let","value":6106,"variable":"x_a"},{"body":[{"type":"let","value":8715,"variable":"x_a"},{"payload":"p_dzpekxyv","type":"nop"}],"kind":"unit","name":"n_ndmozqvz","type":"scope"},{"body":[{"type":"let","value":7168,"variable":"x_a"},{"body":[{"type":"let","value":5166,"variable":"x_a"},{"payload":"p_xkunojzw","type":"nop"}],"kind":"area","name":"n_ebmmneso","type":"scope"},{"body":[{"body":[{"type":"let","value":1537,"variable":"x_a"},{"body":[{"type":"let","value":2852,"variable":"x_a"},{"payload":"p_ulxdbrhn","type":"nop"},{"payload":"p_pjpriolj","type":"nop"},{"payload":"p_bytfzykt","type":"nop"},{"payload":"p_cgvpkfje","type":"nop"},{"payload":"p_risqwuuh","type":"nop"}],"kind":"unit","name":"n_mfuypmsh","type":"scope"}],"kind":"func","name":"n_iimjvvgl","type":"scope"}],"kind":"func","name":"n_muypqkhe","type":"scope"}],"kind":"unit","name":"n_jjeqyguo","type":"scope"}]}

Example 7
Program:
sem x_b 1986
sem x_a 5784
telo n_ummrqrxg
sem x_a 7844
bov p_wcufesdb
nix
telo n_ynivrhvj
sem x_a 5274
gupi n_eckgojog
sem x_a 9034
bov p_ipbqefnk
nix
gupi n_ejfvgsga
sem x_a 3009
bov p_qzmmflrc
bov p_jwnvtybq
bov p_lvklijav
bov p_kbbfgwtw
bov p_fbtrlfld
bov p_gkxvrjso
nix
nix
AST:
{"body":[{"type":"let","value":1986,"variable":"x_b"},{"type":"let","value":5784,"variable":"x_a"},{"body":[{"type":"let","value":7844,"variable":"x_a"},{"payload":"p_wcufesdb","type":"nop"}],"kind":"func","name":"n_ummrqrxg","type":"scope"},{"body":[{"type":"let","value":5274,"variable":"x_a"},{"body":[{"type":"let","value":9034,"variable":"x_a"},{"payload":"p_ipbqefnk","type":"nop"}],"kind":"area","name":"n_eckgojog","type":"scope"},{"body":[{"type":"let","value":3009,"variable":"x_a"},{"payload":"p_qzmmflrc","type":"nop"},{"payload":"p_jwnvtybq","type":"nop"},{"payload":"p_lvklijav","type":"nop"},{"payload":"p_kbbfgwtw","type":"nop"},{"payload":"p_fbtrlfld","type":"nop"},{"payload":"p_gkxvrjso","type":"nop"}],"kind":"area","name":"n_ejfvgsga","type":"scope"}],"kind":"func","name":"n_ynivrhvj","type":"scope"}]}

Example 8
Program:
sem x_b 9863
sem x_a 7572
gupi n_xgurnmrs
sem x_a 1384
bov p_jympynny
nix
gupi n_bmjlhswg
gupi n_byeljvsd
sem x_a 6584
bov p_ridfgvom
nix
gupi n_wmooegnc
sem x_a 4308
xaru n_sirozwri
sem x_a 7107
bov p_kxpsrmub
bov p_nlquarhb
bov p_upeyzene
bov p_nazcxkpw
bov p_cewjhgle
bov p_kbnftnwh
bov p_yijhnzor
nix
nix
nix
AST:
{"body":[{"type":"let","value":9863,"variable":"x_b"},{"type":"let","value":7572,"variable":"x_a"},{"body":[{"type":"let","value":1384,"variable":"x_a"},{"payload":"p_jympynny","type":"nop"}],"kind":"area","name":"n_xgurnmrs","type":"scope"},{"body":[{"body":[{"type":"let","value":6584,"variable":"x_a"},{"payload":"p_ridfgvom","type":"nop"}],"kind":"area","name":"n_byeljvsd","type":"scope"},{"body":[{"type":"let","value":4308,"variable":"x_a"},{"body":[{"type":"let","value":7107,"variable":"x_a"},{"payload":"p_kxpsrmub","type":"nop"},{"payload":"p_nlquarhb","type":"nop"},{"payload":"p_upeyzene","type":"nop"},{"payload":"p_nazcxkpw","type":"nop"},{"payload":"p_cewjhgle","type":"nop"},{"payload":"p_kbnftnwh","type":"nop"},{"payload":"p_yijhnzor","type":"nop"}],"kind":"unit","name":"n_sirozwri","type":"scope"}],"kind":"area","name":"n_wmooegnc","type":"scope"}],"kind":"area","name":"n_bmjlhswg","type":"scope"}]}

TEST
Program:
sem x_a 9961
xaru n_erxvygci
sem x_a 9130
bov p_gjddympn
nix
telo n_qwgqhpew
sem x_a 4845
xaru n_ysjyvevk
sem x_a 3534
telo n_ioelcpuq
sem x_a 1140
gupi n_xamiuajv
sem x_a 1654
bov p_rvotrpew
nix
telo n_oeupaixy
sem x_a 5572
gupi n_hzrdwhlt
sem x_a 7171
xaru n_ofmmmyup
sem x_a 4400
telo n_dlirnhjs
sem x_a 9815
telo n_bcqwwhrj
sem x_a 8409
bov p_rievsgne
bov p_hnpbhrux
bov p_jdtdrgtq
bov p_novlarxp
bov p_gxffydih
bov p_nqxvwyhz
bov p_icetnhcq
bov p_vrimtaoc
nix
nix
nix
nix
nix
nix
nix
nix
AST: