func_code_string: #include <bits/stdc++.h>   using namespace std;   long long gcd(long long a, long long b) {     if (a == 0) return b;     if (b == 0) return a;     return gcd(b % a, a);   }   long long power(long long a, long long b) {     long long res = 1;     while (b > 0) {       if (b % 2 != 0) res = (res * 1ll * a);       b /= 2;       a = (a * 1ll * a);     }     return res;   }   void solve() {     string s;     cin >> s;     long long n = s.length();     bool v = false;     bool h = false;     for (long long i = 0; i < n; i++) {       if (s[i] ==  1 ) {         if (!h) {           h = true;           cout << 1 <<     << 1 << endl;         } else {           h = false;           cout << 1 <<     << 3 << endl;         }       } else {         if (!v) {           v = true;           cout << 3 <<     << 4 << endl;         } else {           v = false;           cout << 1 <<     << 4 << endl;         }       }     }     return;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     solve();     return 0;   }   