#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
typedef long long ll;
const int INF = 1000000000; // 10^9
int main() {
    string A, B;
    cin >> A >> B;

    int score_a = 0;
    int score_b = 0;
    for(int i = 0; i < A.length(); i++) {
        score_a += (int)A[i];
        score_b += (int)B[i];
    }

    if(score_a == score_b){
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }
}