gs2, 23 bytes

Result

WA

Duration

891ms

Code [DL]

00000000  2a 41 29 3e 27 3c c9 ed  26 cc 50 d0 0a ea d1 27  |*A)>'<..&.P....'|
00000010  4d d0 2e d1 2e 31 32                              |M....12|
00000017

stdin

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   K                                              

stdout

                 T
                 T
                 T
                 T
                 T
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                 T
   KKKKKKKKKKKKKK

stderr

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffc7d17ed40 /* 7 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x5636ff7f0d60 /* 7 vars */) = 0
13    execve("/usr/bin/python", ["/usr/bin/python", "/root/gs2.py", "/volume/CODE"], 0x563701702068 /* 7 vars */ <unfinished ...>
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    <... execve resumed> )            = 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=4, si_stime=2} ---
11    +++ exited with 0 +++