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 KIND NAME on one line. KIND and NAME must repeat that block's opening keyword and name. 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 func n_xubbtrah unit n_svuhbhuc let x_a 9147 area n_vatidpaw let x_a 2381 nop p_bmncluwq end area n_vatidpaw func n_bitcouov let x_a 2353 end func n_bitcouov 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 area n_jwjtonjy func n_elakdjlt unit n_zkugdafl let x_a 7468 nop p_djjwjykg end unit n_zkugdafl area n_pqsktqal let x_a 1017 unit n_pijimsaw let x_a 5749 nop p_bkcqvgef end unit n_pijimsaw end area n_pqsktqal 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_igwgjwxr area n_yzroehmu let x_a 1287 unit n_wztpbctn let x_a 2226 nop p_onjrbqqr end unit n_wztpbctn 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 unit n_zjasycsp end unit n_plmwzuun 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 unit n_orcqilwv func n_vptgxaqc func n_jtejogmc let x_a 9799 nop p_ggijypnl end func n_jtejogmc area n_bjobaqua let x_a 6432 nop p_odshpixa nop p_iojfbaoo nop p_psdmjcpx end area n_bjobaqua 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 func n_vtoyqqhf area n_jugfmzum let x_a 1775 func n_mprryqun let x_a 6576 nop p_agedtkcg end func n_mprryqun 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 func n_pqcoyknm end unit n_orkqqzbn 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 unit n_tyonnqti func n_zumeyzwo let x_a 7362 func n_svppttop let x_a 9968 nop p_duhfiapp end func n_svppttop 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 area n_rozsaqva end func n_btantfyt 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_jjsggzpc func n_wjfyport let x_a 2363 unit n_lephpreg let x_a 6811 nop p_forfkwze end unit n_lephpreg 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 unit n_bpcqoznq 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_gzwokkrx func n_jklqiklj area n_cdoyhwqj let x_a 5254 nop p_dgrdtjdm end area n_cdoyhwqj 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 func n_mhrfhtuz end unit n_mdlaxrnb probe q_brsxfyge x_a Answer: 6260 TEST Program prefix: let x_a 5626 unit n_qavkbckb let x_a 7808 nop p_yhzdmnjm end unit n_qavkbckb unit n_lmfswgtk let x_a 5925 unit n_srwjsvyz let x_a 1507 func n_mevohoem let x_a 2700 area n_zoohltwm let x_a 6216 nop p_dfjnbhzd end area n_zoohltwm unit n_yvoubnyh let x_a 6019 unit n_hmyubvun let x_a 8000 unit n_agvcdfdm let x_a 4373 area n_xnddjtjr let x_a 1776 area n_fdirlnfs let x_a 3556 nop p_umxzyobo nop p_gwmhflbx nop p_woberzpp nop p_lhqijyjg nop p_gmqecwhr nop p_kdnpwzvs nop p_fqljtcfu nop p_lydqmeav nop p_kyyzcnhp nop p_urmcxkdz nop p_rztazjav nop p_emtbnacf nop p_fdbclagn nop p_nlpgfhpo nop p_hbutofus nop p_xyaafjpt nop p_naaoitkw nop p_rjpwkdgj nop p_nuofhgga nop p_szqdxrjx nop p_akzgwkcp nop p_elvbjabn nop p_znxzabrf nop p_wwbqumau nop p_kkwouodz nop p_cwnrjsyd nop p_psexkarg nop p_lpedykwk nop p_vxopokhp nop p_hurwpkgb nop p_ptphgeqw nop p_eexeugpd end area n_fdirlnfs end area n_xnddjtjr end unit n_agvcdfdm end unit n_hmyubvun probe q_wkunixtg x_a Answer: