y26-07-task2

#include <iostream>
#include <string>
#include <vector>
#include <unordered_map>

using namespace std;

bool check_string(string a, string b) {
    if (a.length() != b.length()) {
        return false;
    }

    unordered_map<char, char>letters;

    for (int i = 0; i < a.length(); ++i) {
        letters[a[i]] = b[i];
        letters[b[i]] = a[i];
    }

    string result_str;
    for (char i : a) {
        result_str += letters[i];
    }

    return result_str == b;
}

int main() {
    int n;
    cin >> n;

    vector<string>pair(2, "");

    for (int i = 0; i < n; ++i) {
        cin >> pair[0] >> pair[1];
        cout << (check_string(pair[0], pair[1]) ? "YES\n" : "NO\n");
    }

    return 0;
}