#include <stdio.h>

int main() {
    int y,m,d,y1,m1,d1;
    scanf("%d %d %d",&y,&m,&d);
    scanf("%d %d %d",&y1,&m1,&d1);
    long t,t1;
    t = y*100 + m*30 + d;
    t1 = y1*100 + m1*30 + d1;
    if(t1>=t)
        printf("yes");
    else
        printf("no");
    return 0;
}