#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(int i = m;i < n;i++)

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main() {
	string a,b;
	cin >> a >> b;
	int n = a.size();
	string ans = "YES";
	REP(i,n){
		int index = b.find(a[i]);
		if(index == string::npos) {
			ans = "NO";
			break;
		}
		b.erase(index,1);
	}
	if(b != "" ) ans = "NO";
	cout << ans << endl;
	return 0;
}