#include<stdio.h>

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