Follow the task and return only the requested answer, without explanation or Markdown fences.
You will read a prefix of a small scope language.
Every block, regardless of its kind, creates a local scope.
Statements are processed once, from top to bottom.
A let statement binds a variable in the current scope.
The nearest still-open scope containing the variable determines its value.
Bindings in closed scopes are no longer visible.
A nop statement has no effect.
The final probe marks the observation point.
Open blocks at the end of this prefix are intentional.
Do not complete or repair the program.
Return only the decimal integer visible at the final probe.

SYNTAX
The kind keywords are unit for unit, func for func, and area for area. Each creates a local scope.
Open a block with KIND NAME on one line.
Close the innermost open block with end on its own line.
KIND is one of unit, func, area; NAME is n_ followed by exactly eight lowercase letters and is unique in the program.
A binding statement (let) is let 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 nop 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 prefix:
let x_b 4122
let x_a 2890
func n_xubbtrah
let x_a 3834
nop p_gwsvasbv
end
unit n_svuhbhuc
let x_a 9147
area n_vatidpaw
let x_a 2381
nop p_bmncluwq
end
func n_bitcouov
let x_a 2353
end
probe q_weiyabfx x_a
Answer:
9147

Example 2
Program prefix:
let x_b 4643
let x_a 9240
area n_jwjtonjy
let x_a 5060
nop p_zvrdujac
end
func n_elakdjlt
unit n_zkugdafl
let x_a 7468
nop p_djjwjykg
end
area n_pqsktqal
let x_a 1017
unit n_pijimsaw
let x_a 5749
nop p_bkcqvgef
end
end
probe q_onitejyk x_a
Answer:
9240

Example 3
Program prefix:
let x_b 2603
let x_a 4534
area n_igwgjwxr
let x_a 7717
nop p_arlbtehc
end
area n_yzroehmu
let x_a 1287
unit n_wztpbctn
let x_a 2226
nop p_onjrbqqr
end
unit n_jhlqzdhf
let x_a 9616
unit n_plmwzuun
let x_a 1008
unit n_zjasycsp
let x_a 7252
nop p_kzrmnund
nop p_ldxedvla
end
end
probe q_emfmlypw x_a
Answer:
9616

Example 4
Program prefix:
let x_b 7712
let x_a 1404
unit n_orcqilwv
let x_a 5947
nop p_tnxbymlx
end
func n_vptgxaqc
func n_jtejogmc
let x_a 9799
nop p_ggijypnl
end
area n_bjobaqua
let x_a 6432
nop p_odshpixa
nop p_iojfbaoo
nop p_psdmjcpx
end
probe q_ekhnwdvf x_a
Answer:
1404

Example 5
Program prefix:
let x_b 2396
let x_a 1875
func n_vtoyqqhf
let x_a 5155
nop p_jmjfcnjr
end
area n_jugfmzum
let x_a 1775
func n_mprryqun
let x_a 6576
nop p_agedtkcg
end
unit n_orkqqzbn
let x_a 9387
func n_pqcoyknm
let x_a 7662
nop p_secslvsx
nop p_shpapfhe
nop p_hgrvmeey
nop p_qlwoztrf
end
end
probe q_azrftedt x_a
Answer:
1775

Example 6
Program prefix:
let x_b 1134
let x_a 9864
unit n_tyonnqti
let x_a 4034
nop p_bneqoyft
end
func n_zumeyzwo
let x_a 7362
func n_svppttop
let x_a 9968
nop p_duhfiapp
end
func n_hfinelpx
func n_btantfyt
let x_a 5771
area n_rozsaqva
let x_a 2454
nop p_jlrxmplc
nop p_edrrrins
nop p_ebylllhm
nop p_iqroapfl
nop p_qvfomogd
end
end
probe q_smrujqtl x_a
Answer:
7362

Example 7
Program prefix:
let x_b 6259
let x_a 8415
func n_jjsggzpc
let x_a 1241
nop p_qzsnyrmp
end
func n_wjfyport
let x_a 2363
unit n_lephpreg
let x_a 6811
nop p_forfkwze
end
unit n_bpcqoznq
let x_a 8625
nop p_amteviko
nop p_mpcobtyq
nop p_exmjvecm
nop p_xqjinttp
nop p_tzxzsusn
nop p_kzrptmdu
end
probe q_iglmuvnu x_a
Answer:
2363

Example 8
Program prefix:
let x_b 8707
let x_a 6260
func n_gzwokkrx
let x_a 6180
nop p_vazrrapk
end
func n_jklqiklj
area n_cdoyhwqj
let x_a 5254
nop p_dgrdtjdm
end
unit n_mdlaxrnb
let x_a 6264
func n_mhrfhtuz
let x_a 3058
nop p_mdxdngyi
nop p_azlenkox
nop p_kuelkeio
nop p_lediertt
nop p_zxscckam
nop p_vsopddqw
nop p_lasnjtfs
end
end
probe q_brsxfyge x_a
Answer:
6260

TEST
Program prefix:
let x_a 1884
unit n_plzggqxl
let x_a 7983
nop p_sohlmkls
end
func n_lzbxvvtl
let x_a 5297
unit n_ltcqewam
let x_a 8223
nop p_nuagkgjl
end
func n_xoncxnuw
let x_a 8902
unit n_rqbteaew
let x_a 8724
unit n_oyojfclm
let x_a 4233
end
end
probe q_vkuamlfv x_a
Answer: