gs2, 22 bytes

Result

AC

Duration

1222ms

Code [DL]

00000000  07 4b c8 33 0e 2e d0 32  30 07 54 33 0e d0 42 01  |.K.3...20.T3..B.|
00000010  33 33 23 fe 23 d0                                 |33#.#.|
00000016

stdin

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stdout

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   KKKKKKKKKKKKKKKKKKKKKK

stderr

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffc0d4f70b0 /* 7 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x55cdc68d3d60 /* 7 vars */ <unfinished ...>
13    execve("/usr/bin/python", ["/usr/bin/python", "/root/gs2.py", "/volume/CODE"], 0x55cdc755e068 /* 7 vars */ <unfinished ...>
12    <... execve resumed> )            = 0
13    <... execve resumed> )            = 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=8, si_stime=3} ---
11    +++ exited with 0 +++