#include <iostream>
using namespace std;
typedef long long LL;
int main()
{
    LL t;
    cin >> t;
    while(t)
    {
        LL res = 1;
        while(t)
        {
            if(t % 10) res = res * (t % 10);
            t /= 10;
        }
        cout << res << '\n';
        t = res;
        if(t < 10) return 0;
    }

    
    return 0;
}