Pannig

#include <stdio.h>           // press [H]

int main(void) {
  printf("longcat is\n");
  printf("l\n");
  printf("o\n");
  printf("o\n");
  printf("o\n");             // press [M]
  printf("o\n");
  printf("o\n");
  printf("o\n");
  printf("n\n");
  printf("g\n");
  return 0;
}                            // press [L]

[ aaaaa ]
[ bbbbb ]
[ ccccc ]
[ ddddd ] -----------------> [ ddddd ]
[ eeeee ]                    [ eeeee ]
[ fffff ] ---> [ fffff ]     [ fffff ]
[ ggggg ]      [ ggggg ]     [ ggggg ]
               [ hhhhh ]     [ hhhhh ]
               [ iiiii ]     [ iiiii ]
               [ jjjjj ]     [ jjjjj ]
               [ kkkkk ]
               [ lllll ]

original:      [Ctrl]+[f],   [Ctrl]+[d]