main()
{
int index, square;

   for(index = 1;index < 13; index = index + 1) {
      square = index * index;
      printf("%5d%5d\n",index, square);
   }
}



/* Result of execution

    1    1
    2    4
    3    9
    4   16
    5   25
    6   36
    7   49
    8   64
    9   81
   10  100
   11  121
   12  144

*/