#include <fstream>
#include <string>
#include <math.h>
using namespace std;
ifstream g("cifra.in");
ofstream gg("cifra.out");
char c;
int main()
{
    int T,i=1,a,n,j;
    g>>T;
    while(i<=T)
    {
        g>>c; n=c-'0';  j=1; a=0;
        while(j<=n)
        {
            a=a+pow(j,j);
            j++;
        }
        gg<<a%10<<" ";
        i++;
    }
    return 0;
}