#include<bits/stdc++.h>
using namespace std;
char a[10],b[10];
int main(){
	cin>>a[1]>>a[2]>>a[3]>>a[4]>>b[1]>>b[2]>>b[3]>>b[4];
	sort(a+1,a+5);
	sort(b+1,b+5);
	for(int i=1;i<=4;i++){
		if(a[i]!=b[i]){
			cout<<"no"<<endl;
			return 0;
		}
	}
	cout<<"yes"<<endl;
	return 0;
}