lua, 139 bytes

Result

AC

Duration

710ms

Code [DL]

o=io.read
i=o"l"
j=i
r=i:find"T"
while not j:find"K"do
print(i)
j=o"l"
end
l=j:find"K"
f=i.rep
print(f(" ",l-1)..f("K",r-l+1)..f(" ",#i-r))

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                 
                                T                 
                                T                 
                                T                 
                                T                 
                                T                 
                                T                 
                                T                 
                                T                 
                                T                 
                                T                 
                                T                 
         KKKKKKKKKKKKKKKKKKKKKKKK                 

stderr

strace