#include<bits/stdc++.h>

using namespace std;

/// Typedef
typedef long long ll;

#define sc1(a) scanf("%lld",&a)
#define sc2(a,b) scanf("%lld %lld",&a,&b)

#define pf1(a) printf("%lld\n", a)
#define pf2(a,b) printf("%lld %lld\n",a,b)

int main() {

    //seive();
    //preCal();

    ll tc, num, t = 1, choose;

    //freopen("/opt/Coding/clion code/input.txt", "r", stdin);
    //freopen("/opt/Coding/clion code/output.txt", "w", stdout);


    sc2(num, tc);


    if(tc % num != 0) return cout << "-1" << endl,0;

    ll div = tc / num;

    ll ans = 0;

    while (div % 2 == 0){
        ans++;
        div /= 2;
    }

    while (div % 3 == 0){
        ans++;
        div /= 3;
    }

    if(div == 1) cout << ans << endl;
    else cout << "-1" << endl;

    return 0;
}