#include <stdio.h>
#include <stdlib.h>

int main(int argc, char ** argv)
{
  int m, n, m2, n2;
  char dummy;

  if (argc != 3 ||
      sscanf(argv[1], "%d %c", &m, &dummy) != 1 ||
      sscanf(argv[2], "%d %c", &n, &dummy) != 1 ||
      !(0 <= m && m <= 59) || !(0 <= n && n <= 59)) {
    fprintf(stderr, "error\n");
    return -1;
  }

  m2 = m / 2, n2 = n / 2 + m % 2 * 30;

  printf("%2d'%2d\"\n", m2, n2);

  return 0;
}