vim, 32 bytes

Result

WA

Duration

832ms

Code [DL]

:%s/.* \(.\)\1.\|..\(.\).*/\1\2/

Disassembly

:%s/.* \(.\)\1.\|..\(.\).*/\1\2/

stdin

124 562
383 482
841 512
411 159
899 223
931 338
475 772
542 559
511 947
696 951
622 612
511 613
353 625
811 142
383 771
426 625
544 447
337 771
515 457
541 844
365 529
157 576
425 297
611 913
238 835
795 171
249 996
833 336
277 117
774 428
157 763
692 928

stdout

124 562
383 482
841 512
411 159
899 223
931 338
475 772
542 559
511 947
696 951
622 612
511 613
353 625
811 142
383 771
426 625
544 447
337 771
515 457
541 844
365 529
157 576
425 297
611 913
238 835
795 171
249 996
833 336
277 117
774 428
157 763
692 928

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffc1c8b6f20 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55de4eae2d00 /* 9 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/vim", ["/usr/bin/vim", "-N", "-u", "NONE", "-i", "NONE", "-s", "/volume/CODE", "/tmp/out"], 0x55de50849288 /* 10 vars */) = 0
12    +++ exited with 1 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=1, si_utime=0, si_stime=2} ---
13    execve("/bin/cat", ["cat", "/tmp/out"], 0x55de4eae2c98 /* 9 vars */) = 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=0, si_stime=0} ---
14    execve("/bin/rm", ["rm", "/tmp/out"], 0x55de4eae2c98 /* 9 vars */) = 0
14    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
10    +++ exited with 0 +++