golang, 132 bytes

Result

WA

Duration

1772ms

Code [DL]

package main
import."fmt"
func main(){var s,t string;var i=0;for i<32{Scan(&s, &t);if s[1]==s[2]{Print(s[2])}else{Print(t[0])};i++}}

stdin

322 413
955 751
943 773
671 721
644 744
164 592
815 449
631 335
591 598
323 338
285 533
162 261
649 941
467 672
731 127
757 145
155 447
985 855
164 344
334 386
266 662
181 887
757 155
943 631
811 117
411 359
657 778
421 287
499 558
144 413
867 893
922 245

stdout

5053555552535251535153505754494953565151545649544949555057525650

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff4ec05ba0 /* 7 vars */) = 0
11    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x561f3bf7dd18 /* 7 vars */) = 0
11    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=11, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
12    execve("/bin/ln", ["ln", "-sf", "/volume/CODE", "/tmp/code.go"], 0x561f3bf7dd38 /* 7 vars */) = 0
12    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    execve("/usr/bin/go", ["/usr/bin/go", "build", "-o", "/tmp/code", "/tmp/code.go"], 0x561f3ca6a028 /* 7 vars */) = 0
20    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0002c9ba0 /* 25 vars */) = 0
21    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0002ce0d0 /* 25 vars */) = 0
24    +++ exited with 0 +++
23    +++ exited with 0 +++
22    +++ exited with 0 +++
25    +++ exited with 0 +++
20    +++ exited with 0 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=20, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
28    +++ exited with 0 +++
29    +++ exited with 0 +++
30    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0002ce270 /* 25 vars */) = 0
27    +++ exited with 0 +++
21    +++ exited with 0 +++
26    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
31    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0002ce410 /* 25 vars */) = 0
34    +++ exited with 0 +++
33    +++ exited with 0 +++
35    +++ exited with 0 +++
32    +++ exited with 0 +++
30    +++ exited with 0 +++
26    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
39    +++ exited with 0 +++
36    +++ exited with 0 +++
37    +++ exited with 0 +++
38    +++ exited with 0 +++
31    +++ exited with 0 +++
19    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=31, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
40    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-o", "/tmp/go-build718788080/b001/_pkg"..., "-trimpath", "/tmp/go-build718788080/b001=>", "-p", "main", "-complete", "-buildid", "YdH6vVrRHIMxSYD_eLCe/YdH6vVrRHIM"..., "-goversion", "go1.13.10", "-D", "_/tmp", "-importcfg", "/tmp/go-build718788080/b001/impo"..., "-pack", "-c=2", "/tmp/code.go"], 0xc00027e5b0 /* 25 vars */) = 0
42    +++ exited with 0 +++
41    +++ exited with 0 +++
43    +++ exited with 0 +++
40    +++ exited with 0 +++
16    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=40, si_uid=0, si_status=0, si_utime=1, si_stime=0} ---
44    execve("/usr/lib/go/pkg/tool/linux_amd64/link", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc00022a270 /* 25 vars */) = 0
46    +++ exited with 0 +++
47    +++ exited with 0 +++
45    +++ exited with 0 +++
48    +++ exited with 0 +++
44    +++ exited with 0 +++
18    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=44, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
49    execve("/usr/lib/go/pkg/tool/linux_amd64/link", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-o", "/tmp/go-build718788080/b001/exe/"..., "-importcfg", "/tmp/go-build718788080/b001/impo"..., "-buildmode=exe", "-buildid=AElq7v0SJFJZgPxQCTJh/Yd"..., "-extld=gcc", "/tmp/go-build718788080/b001/_pkg"...], 0xc00027e9c0 /* 25 vars */) = 0
52    +++ exited with 0 +++
51    +++ exited with 0 +++
50    +++ exited with 0 +++
49    +++ exited with 0 +++
16    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=49, si_uid=0, si_status=0, si_utime=21, si_stime=5} ---
26    +++ exited with 0 +++
19    +++ exited with 0 +++
18    +++ exited with 0 +++
17    +++ exited with 0 +++
16    +++ exited with 0 +++
15    +++ exited with 0 +++
14    +++ exited with 0 +++
13    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=4, si_stime=13} ---
53    execve("/bin/cat", ["cat", "-"], 0x561f3bf7dd08 /* 7 vars */) = 0
54    execve("/tmp/code", ["/tmp/code"], 0x561f3bf7dcf0 /* 7 vars */) = 0
53    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=53, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
55    +++ exited with 0 +++
56    +++ exited with 0 +++
58    +++ exited with 0 +++
57    +++ exited with 0 +++
54    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=54, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
59    execve("/bin/rm", ["rm", "/tmp/code.go", "/tmp/code"], 0x561f3bf7dcf0 /* 7 vars */) = 0
59    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=59, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
10    +++ exited with 0 +++