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

#define mod 100000

int solve(int n)
{
    int i,gun=1;
    for(i=1;i<=n;i++)
    {
        gun*=i;
        while(gun%10==0){
            gun/=10;
        }
        gun%=mod;
    }
    return gun%10;
}


int main()
{
    int n,i,k,j,ans;
    while(cin>>n)
    {
        ans=solve(n);
        printf("%5d -> %d\n",n,ans);
    }
    return 0;
}