#include <stdio.h>

int main() {
    int y,m,d,y1,m1,d1;
    scanf("%d %d %d\n%d %d %d",&y,&m,&d,&y1,&m1,&d1);
    if(y1>=y&&m1>=m&&d1>=d)
    printf("yes\n");
    else if(y1>y)
    printf("yes\n");
    else if(y1==y&&m1>m)
    printf("yes\n");
    else
    printf("no\n");
    return 0;
}