/* 
 * File:   main.cpp
 * Author: virtualdemon
 *
 * Created on February 9, 2010, 12:58 PM
 */
#include <cstdio>
#include <cstring>

/*
 *
 */
using namespace std;
const short int v[]={ 0, 1, 5, 2, 8, 3, 9, 2, 8, 7, 7, 8, 4, 7, 3, 8, 4, 1, 5, 4, 4, 5, 9, 6, 2, 7, 3, 6, 2, 1, 1, 2, 8, 1, 7, 2, 8, 5, 9, 8, 8, 9, 3, 0, 6, 1, 7, 0, 6, 5, 5, 6, 2, 5, 1, 6, 2, 9, 3, 2, 2, 3, 7, 4, 0, 5, 1, 4, 0, 9, 9, 0, 6, 9, 5, 0, 6, 3, 7, 6, 6, 7, 1, 8, 4, 9, 5, 8, 4, 3, 3, 4, 0, 3, 9, 4, 0, 7, 1, 0, 0 };
int main()
{
    int t, n;
    char s[100];
    freopen( "cifra.in", "rt", stdin );
    freopen( "cifra.out", "wt", stdout );
    scanf("%d", &t );
    for( ; t; --t )
    {
        scanf("%s", s );
        n=strlen(s);
        if( 1 == n )
        {
            printf("%hd\n", v[s[0]-'0'] );
            continue;
        }
        n=(s[n-1]-'0')*10+s[n-2]-'0';
        printf("%hd\n", v[n] );
    }
    return 0;
}