#include <stdio.h>
int main()
{
    int year,month,date;
    scanf("%d %d %d",&year,&month,&date);
    int x,y,z;
    scanf("%d %d %d",&x,&y,&z);
    printf((x>year||(x==year&&y>month)||(x==year&&y==month&&z>=date))?"yes":"no");   
    return 0;
}