#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
void small(string &a) {
    for (int i = 0; i < a.size(); ++i) {
        if ('A' <= a[i] && a[i] <= 'Z') {
            a[i] = a[i] - 'A' + 'a';
        }
    }
}
int main() {
    string a;
    string b;
    getline(cin, a);
    getline(cin, b);
    vector <char> ac;
    vector <char> bc;
    small(a);
    small(b);
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());

    for (int i = 0; i < a.size(); ++i) {
        if (i > 0) {
            if (a[i] == ' ') {
            }
            else if (a[i] != a[i - 1]) {
                ac.push_back(a[i]);
            }
        }
        else {
            ac.push_back(a[i]);
        }
    }
    for (int i = 0; i < b.size(); ++i) {
        if (i > 0) {
            if (b[i] == ' ') {
            }
            if (b[i] != b[i - 1]) {
                bc.push_back(b[i]);
            }
        }
        else {
            bc.push_back(b[i]);
        }
    }


    for (int i = 0; i < ac.size(); ++i) {
        cout << ac[i];
    }
    cout << endl;
    for (int i = 0; i < bc.size(); ++i) {
        cout << bc[i];
    }
    cout << endl;
    if (ac == bc) {
        cout << "YES";
    }
    else {
        cout << "NO";
    }
    return 0;
}