#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cmath>

#define rep(i,n) for(i=0; i<n; ++i)
#define in(a) cin >> a
#define out(a,b) cout << a << b
using namespace std;
using lint = long long;

int main(void){
    int i, j, n, m, k, cnt = 0;
    string a, b;
    in(a);
    in(b);
    bool f[10], same;
    rep(i,10)   f[i]=true;
    k=a.size();
    rep(i,k){
        rep(j,k){
            same=false;
            if(a[i]==b[j]&&f[j]){
                f[j]=false;
                same=true;
                break;
            }
        }
        if(!same)   break;
    }
    if(same)    out("YES",endl);
    else    out("NO",endl);
    return 0;
}