ocaml, 159 bytes

Result

AC

Duration

1052ms

Code [DL]

open String
let rec r s=let t=read_line()in s^"\n"^(try let p=index t 'K'in(make p ' ')^(make((index s 'T')-p+1)'*')with _->r s);;print_endline(r(read_line()))

stdin

                                              T   
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                              K                   

stdout

                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                                              T   
                              *****************

stderr

strace