#include <iostream> #include <string> using namespace std; bool stringLengthsEqual(const string& s1, const string& s2) { return s1.length() == s2.length(); } int main() { string s1, s2; cin >> s1 >> s2; if (stringLengthsEqual(s1, s2)) { cout << "yes" << endl; } else { cout << "no" << endl; } return 0; }