c-gcc, 105 bytes

Result

AC

Duration

797ms

Code [DL]

b;char c[99],d[99];main(){gets(c);while(gets(d))puts(c);for(;d[++b]-75;);for(;c[b]-84;)++c[b++];puts(c);}

stdin

             T                                    
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
    K                                             

stdout

             T                                    
             T                                    
             T                                    
             T                                    
             T                                    
             T                                    
             T                                    
             T                                    
             T                                    
             T                                    
    !!!!!!!!!T                                    

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
 b;char c[99],d[99];main(){gets(c);while(gets(d))puts(c);for(;d[++b]-75;);for(;c[b]-84;)++c[b++];puts(c);}
 ^
/tmp/code.c:1:1: warning: type defaults to 'int' in declaration of 'b' [-Wimplicit-int]
/tmp/code.c:1:20: warning: return type defaults to 'int' [-Wimplicit-int]
 b;char c[99],d[99];main(){gets(c);while(gets(d))puts(c);for(;d[++b]-75;);for(;c[b]-84;)++c[b++];puts(c);}
                    ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:27: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration]
 b;char c[99],d[99];main(){gets(c);while(gets(d))puts(c);for(;d[++b]-75;);for(;c[b]-84;)++c[b++];puts(c);}
                           ^~~~
/tmp/code.c:1:49: warning: implicit declaration of function 'puts' [-Wimplicit-function-declaration]
 b;char c[99],d[99];main(){gets(c);while(gets(d))puts(c);for(;d[++b]-75;);for(;c[b]-84;)++c[b++];puts(c);}
                                                 ^~~~

strace