fish, 95 bytes

Result

AC

Duration

2766ms

Code [DL]

0v
i<o*48+1v!?%c
 vo*25n1<
v>i25*=?
>:>:?!v1'K'iv
o ^o*8 4-v?=<
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^*25n1~< +
 n1-1;!?:<

stdin

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   K                                              

stdout

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   111111111111

stderr

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffea14f58c0 /* 7 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x558d5a3c1d68 /* 7 vars */) = 0
13    execve("/usr/bin/python3", ["/usr/bin/python3", "/root/fish.py", "/volume/CODE"], 0x558d5bdd3068 /* 7 vars */) = 0
12    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=51, si_stime=34} ---
11    +++ exited with 0 +++