#include <stdio.h>

int main()
{
   int resultcount = 0;
   int input1 = 0;
   int input2 = 0;

   resultcount = scanf("%d %d", &input1, &input2);

   while (resultcount == 2)
   {
      if (input1 + input2 == 10)
         printf("%d %d ", input1, input2);

      resultcount = scanf("%d %d", &input1, &input2);
   }

   return 0;
}