moo, 55 bytes

Result

AC

Duration

799ms

Code [DL]

1{3{i1+o1c}2{sdi+do75=+s1s-d3 2b}50 2c}0{ido32=1 0b}0dc

stdin

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     K                                            

stdout

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     K!!!!!!!                                     

stderr

thread 'main' panicked at 'stdin is closed @ 15', src/main.rs:321:25
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fffe1260f90 /* 8 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55d5dedb7c10 /* 8 vars */ <unfinished ...>
12    execve("/usr/bin/moo", ["/usr/bin/moo", "/volume/CODE"], 0x55d5dedb7c28 /* 8 vars */ <unfinished ...>
11    <... execve resumed> )            = 0
12    <... execve resumed> )            = 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    +++ exited with 101 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=101, si_utime=0, si_stime=0} ---
10    +++ exited with 101 +++