erlang, 207 bytes

Result

AC

Duration

1722ms

Code [DL]

%%!
f(S,I)->case string:chr(io:get_line(""),$K)of
0->io:format(S),f(S,I);J->io:format(string:copies(" ",J-1)++string:copies("*",2+I-J))
end.
main(_)->I=string:chr(S=io:get_line(""),$T)-1,io:format(S),f(S,I).

stdin

                    T                             
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
           K                                      

stdout

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

stderr

strace