#include <iostream>
#include <string>
using namespace std;

int main()
{
	string A, B;
	cin >> A >> B;

	for(int i = 0; i < A.length(); ++i)
	{
		if((int)B.find(A[i]) == -1)
		{
			cout << "NO" << endl;
			return 0;
		}
		B.erase(B.find(A[i]));
	}

	cout << "YES" << endl;
	return 0;
}