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


int reverse(int n) {
  int reversed = 0;
  while (n > 0) {
    reversed = reversed * 10 + n % 10;
    n /= 10;
  }
  return reversed;
}


int main(int argc, char **argv) {
  int a, b;
  scanf("%d %d", &a, &b);
  a = reverse(a);
  b = reverse(b);

  printf("%d\n", a > b ? a : b);
  return 0;
}