func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     ios::sync_with_stdio(0);     cin.sync_with_stdio(0);     cin.tie(0);     long long t;     cin >> t;     while (t--) {       long long a, b;       cin >> a >> b;       if (a > b) swap(a, b);       long long ans = 0;       while (a * 8 <= b) {         a *= 8;         ans++;       }       while (a * 4 <= b) {         a *= 4;         ans++;       }       while (a * 2 <= b) {         a *= 2;         ans++;       }       if (a == b) {         cout << ans <<   n ;       } else {         cout << -1 <<   n ;       }     }   }   