func_code_string: #include <bits/stdc++.h>   using namespace std;   long long r(long long a) {     long long i = 0;     while (a % 2 == 0) {       a /= 2;       ++i;     }     return i;   }   void one_case() {     long long a, b;     cin >> a >> b;     auto ra = r(a);     auto rb = r(b);     a /= (1ll << ra);     b /= (1ll << rb);     if (a != b) {       cout <<  -1 n ;       return;     }     cout << (abs(ra - rb) + 2) / 3 <<   n ;   }   int main() {     std::ios::sync_with_stdio(false);     std::cin.tie(nullptr);     int t = 1;     cin >> t;     while (t--) {       one_case();     }     return 0;   }   