#include<iostream>
using namespace std;

int main(){
    int a,b;
    char A[4], B[4];
    scanf("%c.%c.%c " , &A[0] , &A[1], &A[2]);
    a = atoi(A);
    scanf(" %c.%c.%c " , &B[0] , &B[1], &B[2]);
    b = atoi(B);

    if(b <= a) cout << "YES";
    else       cout << "NO";
    cout << endl;
    return 0;
}