vim, 43 bytes

Result

AC

Duration

881ms

Code [DL]

:%s/.\(.\)\1 .*/\1/g
:%s/.* \(.\).*/\1/g
ZZ

Disassembly

:%s/.\(.\)\1 .*/\1/g<NL>:%s/.* \(.\).*/\1/g<NL>ZZ

stdin

862 887
948 413
513 171
742 346
411 454
144 889
544 149
622 956
695 514
392 495
395 634
789 891
421 227
715 871
515 156
689 264
286 188
236 268
791 818
422 224
377 793
145 554
422 225
799 559
466 569
318 116
738 838
548 881
536 639
636 694
528 993
811 175

stdout

8
4
1
3
1
4
4
2
5
4
6
8
2
8
1
2
1
2
8
2
7
5
2
9
6
1
8
8
6
6
9
1

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd31211730 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x560a4e423d00 /* 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"], 0x560a4f128288 /* 10 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=1} ---
13    execve("/bin/cat", ["cat", "/tmp/out"], 0x560a4e423c98 /* 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"], 0x560a4e423c98 /* 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 +++