func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(NULL);     cout.tie(NULL);     string s1, s2;     cin >> s1 >> s2;     if (s1.size() > s2.size())       cout << s1.size();     else if (s2.size() > s1.size())       cout << s2.size();     else if (s1 == s2)       cout <<  -1 ;     else       cout << s1.size();     return 0;   }   