#include <cstdio>
int t, i, j, len, r;
char a[100]={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};
char x[105];

int main()
{
    freopen("cifra.in","r",stdin);
    freopen("cifra.out","w",stdout);
    scanf("%d", &t);
    gets(x);
    for (i = 0; i < t; i++)
    {
        gets(x);
        for (len = 0; x[len]; len++);
        if (len >= 2)
            r = (x[len - 2] - '0') * 10 + x[len - 1] - '0';
        else
            r = x[len - 1] - '0';
        printf("%d\n", a[r]);
    }
    return 0;
}