#include <cstdio>
#include <cstring>
using namespace std;
int t,n, x, v[105]={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};
char s[105];
int main()
{
    freopen("cifra.in", "r", stdin);
    freopen("cifra.out", "w", stdout);

    scanf("%d\n", &t);
    for(int i=1; i<=t; i++)
    {
        gets(s);
        n=strlen(s);
        if(n == 1) x=s[0]-'0';
        else x=(s[n-2]-'0')*10+s[n-1]-'0';
    printf("%d\n",  v[x]);
    }

    return 0;
}