#include<bits/stdc++.h> using namespace std; int main() { char a[151]; cin >> a; char b[151]; cin >> b; int e = 0, f = 0; while (a[e] != '\0') { e += 1; } while (b[f] != '\0') { f += 1; } if (e == f) { cout << "yes"; } else { cout << "no"; } return 0; }