#include <stdio.h>

int main(void)
{
int a[100];
int b[100];
int c[100];
int i;
int a1;
int a2;
int a3;
char c1[2];

for(i=0;i<2;i++){
	scanf("%d%c%d%c%d",&a[i],&c1[i],&b[i],&c[i],&c[i]);
}
if(a[0]>a[1]){

	printf("YES\n");
	
}else if(a[0]==a[1]&&b[0]>b[1]){
	
	printf("YES\n");
}else if(a[0]==a[1]&&b[0]==b[1]&&c[0]>c[1]){
	printf("YES\n");
}else{
	printf("NO\n");
}
	return 0;
}