game23

#include <iostream>

using namespace std;

int main() {
  long long m;
  long long n;
  cin >> m >> n;

  long long dif = n / m;
  int ctr = 0;

  if (n == m) {
    cout << 0;
    return 0;
  }

  if (n % m != 0L || (n % 2 != 0 && n % 3 != 0)) {
    cout << -1;
    return 0;
  }

  while (dif % 2 == 0) dif /= 2, ctr++;
  while (dif % 3 == 0) dif /= 3, ctr++;

  cout << (dif == 1 ? dif : -1);
}