xslt, 420 bytes

Result

AC

Duration

4531ms

Code [DL]

<stylesheet version="1.0" xmlns="http://www.w3.org/1999/XSL/Transform">
<output method="text"/><template match="/"><variable name="input" select="input"/><for-each select="0 to 31"><choose><when test="substring($input,.*8+2,1)=substring($input,.*8+3,1)"><value-of select="substring($input,.*8+3,1)"/></when><otherwise><value-of select="substring($input,.*8+5,1)"/></otherwise></choose></for-each></template></stylesheet>

stdin

116 112
588 775
737 131
813 313
745 457
347 739
523 818
522 224
652 755
116 629
377 779
164 288
113 238
933 661
322 729
592 993
891 263
637 443
169 119
143 438
735 559
361 215
314 126
598 985
863 331
473 373
855 653
911 142
899 938
711 675
449 474
277 861

stdout

18134782767223292414521933519147

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd30610240 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x564d86c6ad00 /* 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("/usr/bin/java", ["java", "-jar", "saxon9he.jar", "-xsl:preprocess.xsl", "-s:preprocess.xsl", "-o:/tmp/input.xml"], 0x564d87213090 /* 7 vars */) = 0
12    execve("/usr/bin/java", ["java", "-jar", "saxon9he.jar", "-xsl:preprocess.xsl", "-s:preprocess.xsl", "-o:/tmp/input.xml"], 0x7f7429504f80 /* 8 vars */) = 0
12    --- SIGRT_2 {si_signo=SIGRT_2, si_code=SI_TKILL, si_pid=12, si_uid=0} ---
12    --- SIGRT_2 {si_signo=SIGRT_2, si_code=SI_TKILL, si_pid=12, si_uid=0} ---
13    --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
13    --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x14} ---
13    --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x14} ---
23    +++ exited with 0 +++
17    +++ exited with 0 +++
14    +++ exited with 0 +++
13    +++ exited with 0 +++
24    +++ exited with 0 +++
22    +++ exited with 0 +++
21    +++ exited with 0 +++
18    +++ exited with 0 +++
16    +++ exited with 0 +++
15    +++ exited with 0 +++
19    +++ exited with 0 +++
20    +++ exited with 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=165, si_stime=29} ---
25    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x564d86c6ad18 /* 7 vars */) = 0
25    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=25, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
26    execve("/bin/ln", ["ln", "-sf", "/volume/CODE", "/tmp/code.xsl"], 0x564d86c6ad38 /* 7 vars */) = 0
26    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=26, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
27    execve("/usr/bin/java", ["java", "-jar", "saxon9he.jar", "-xsl:/tmp/code.xsl", "-s:/tmp/input.xml", "-o:/tmp/output"], 0x564d87213078 /* 7 vars */) = 0
27    execve("/usr/bin/java", ["java", "-jar", "saxon9he.jar", "-xsl:/tmp/code.xsl", "-s:/tmp/input.xml", "-o:/tmp/output"], 0x7fc3f29edf60 /* 8 vars */) = 0
27    --- SIGRT_2 {si_signo=SIGRT_2, si_code=SI_TKILL, si_pid=27, si_uid=0} ---
27    --- SIGRT_2 {si_signo=SIGRT_2, si_code=SI_TKILL, si_pid=27, si_uid=0} ---
28    --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
38    +++ exited with 0 +++
32    +++ exited with 0 +++
29    +++ exited with 0 +++
28    +++ exited with 0 +++
39    +++ exited with 0 +++
37    +++ exited with 0 +++
36    +++ exited with 0 +++
34    +++ exited with 0 +++
33    +++ exited with 0 +++
31    +++ exited with 0 +++
30    +++ exited with 0 +++
35    +++ exited with 0 +++
27    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=27, si_uid=0, si_status=0, si_utime=168, si_stime=30} ---
40    execve("/bin/cat", ["cat", "/tmp/output"], 0x564d86c6ac98 /* 7 vars */) = 0
40    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=40, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
41    execve("/bin/rm", ["rm", "/tmp/input", "/tmp/input.xml", "/tmp/code.xsl", "/tmp/output"], 0x564d87213068 /* 7 vars */) = 0
41    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=41, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
10    +++ exited with 0 +++