#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	int n;
	while(cin>>n){
		int t=1;
		for(int i=1;i<=n;i++){
			t*=i;
			while(1){
				if(t%10!=0) break;
				else t/=10;
			}
			t%=10000;
			}
		cout<<setw(5)<<n<<" -> "<<t%10<<endl;
	}
	return 0;
}