#include <stdio.h>
//尝试先不考虑闰年月为30  ---应该不精确
int main() {
    int y,m,d=0;
    scanf("%4d %d %2d",&y,&m,&d);
    int y1,m1,d1=0;
    scanf("%4d %d %2d",&y1,&m1,&d1);
    int sum,sum1=0;
    sum=y*365+m*30+d;
    sum1=y1*365+m1*30+d1;
    if(sum>sum1){
        printf("no\n");
    }
    else{
        printf("yes\n");
    }
    return 0;
}