#include <cstdio>
#include <algorithm>

using namespace std;

int a, b, c, d;

int main( void ) {
 
 	scanf( "%d%d", &a, &b );
 	while( a > 0 ) {
		c = c * 10 + a % 10;
		a /= 10;	
	}
 	while( b > 0 ) {
		d = d * 10 + b % 10;
		b /= 10;	
	}

	printf( "%d\n", max( c, d ) );
 
    return 0;
    
}