#include <cstdio>

void rev(int &x) {
  x = 100*(x%10) + 10*(x/10%10) + x/100;
}

int main(void) {
  int a, b;
  scanf("%d%d", &a, &b);
  rev(a); rev(b);
  if (a < b) a = b;
  printf("%d\n", a);
  return 0;
}