triangularity, 241 bytes

Result

AC

Duration

721ms

Code [DL]

.......... ..........
.........")".........
........"[0]"........
......."DIN]]".......
......"d in[ST"......
....."r a,*b,c,".....
...."')+1,'*')fo"....
..."ust(a.find('T"...
..")+c.rstrip().lj"..
."a+'\n')*(1+len(b)".
      "([("+++++++++E

stdin

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   K                                              

stdout

                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
                         T                        
   K**********************

stderr

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd107efe00 /* 7 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x561544c91d80 /* 7 vars */) = 0
13    execve("/usr/bin/python3", ["/usr/bin/python3", "/root/Triangularity/Triangularit"..., "/volume/CODE"], 0x56154684c090 /* 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=1, si_stime=0} ---
11    +++ exited with 0 +++