#include <bits/stdc++.h>
#define int int64_t
using namespace std;

const int INF = 1e9 + 7;
const int N = 1e5 + 10;

int32_t main(){
    int a, b;
    cin >> a >> b;
    int ans = 0;
    if(b % a != 0){
        cout << -1;
        return 0;
    }
    int cur = b / a;
    while(cur % 2 == 0){
        cur /= 2;
        ans ++;
    }
    while(cur % 3 == 0){
        cur/= 3;
        ans ++;
    }
    if(cur == 1)
        cout << ans;
    else
        cout << -1;
    }