fish, 66 bytes

Result

AC

Duration

1844ms

Code [DL]

1v
i<+1:?%8    v?%4:o:
> ~~:v   n1<>
^2%?v>1-:?!^i:o:a=?
1-1n>:?!;

stdin

                                 T                
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                      K                           

stdout

                                 T                
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                                 1                 
                      K11111111111

stderr

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd0e7871a0 /* 7 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x55a943f0ad68 /* 7 vars */ <unfinished ...>
13    execve("/usr/bin/python3", ["/usr/bin/python3", "/root/fish.py", "/volume/CODE"], 0x55a944447068 /* 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=28, si_stime=19} ---
11    +++ exited with 0 +++