#include <bits/stdc++.h>

using namespace std;

int main() {
    string s1, s2;
    getline(cin, s1);
    getline(cin, s2);

    //字符串转大写.
    // Q1:为什么用 ::tolower 呢？
    // https://www.cnblogs.com/blink-cz/p/12374069.html
    transform(s1.begin(), s1.end(), s1.begin(), ::toupper);
    transform(s2.begin(), s2.end(), s2.begin(), ::toupper);

    if (s1 == s2) {
        cout << "YES";
    } else {
        cout << "NO";
    }
    return 0;
}