#include<bits/stdc++.h>
using namespace std;
using LL = long long;
using ULL = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

pair<int, int> g(int x) {
    pair<int, int> buf = { 0,0 };
    while (x % 2 == 0) { buf.first++; x /= 2; }
    while (x % 5 == 0) { buf.second++; x /= 5; }
    return buf;
}

int main() {
    int x, y; cin >> x >> y;

    rep(i, 35) {
        pair<int, int> px = g(x), py = g(y);

        if ((px.first + px.second + py.first + py.second) % 2 == 0) {
            x *= 2;
        }
        else {
            if (abs(py.first - px.first) > abs(py.second - px.second)) {
                if (px.first < py.first) x *= 2;
                else x /= 2;
            }
            else {
                if (px.second < py.second) x *= 5;
                else x /= 5;
            }
        }

        cout << x << endl;
        if (x == y) break;


        cin >> y;
        if (x == y) break;
    }

    return 0;
}