#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();
	cout << n << endl;
	rep(i,n){
		rep(j,n){
			if(b[i] == a[j]) a[j] = '0';
		}
	}
	int flag = 0;
	rep(i,n){
		if(a[i] != 0){
			flag = 1;
			break;
		}
	}

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


	return 0;
}