#define ll long long
#define ffor(i,a,b) for (int i=(a);i<(b);i++)
#define rfor(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define rep(i,n) for (int i=0;i<(n);i++)
#define rrep(i,n) for (int i=(n)-1;i>=0;i--)
#include<iostream>
#include<iomanip>
#include<algorithm>
#include<cmath>
#include<string>
#include<stack>
#include<queue>
#include<vector>
#define SIZE 100001
#define MOD 1000000007
#define INF 100000000
using namespace std;

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);

	string a,b;
	cin >> a;
	cin >> b;

	int n = a.length();
	rep(i,n){
		rep(j,n){
			if(b[i] == a[j]){
				a[j] = 'A';
				b[i] = 'A';
			}
		}
	}

int flag = 0;
rep(i,n){
	if(a[i] != 'A'){
		flag = 1;
		break;
	}
	else flag = 0;
}

//rep(i,n) cout << a[i] << endl;

cout << ((flag == 1) ? "NO":"YES") << endl;

	return 0;
}