#include <stdio.h>
#include <string.h>
 
int A[] = {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()
{
    freopen("cifra.in", "r", stdin);
    freopen("cifra.out", "w", stdout);
    int sum = 0, n, pos,j,i,t;char num[200];
    
    scanf("%d ", &t);
    for (i=0; i<t; ++i) 
    {   j= 0;
        fgets(num, 200, stdin);
        n = strlen(num);
        pos= num[n-2]-'0';
        if (n >= 3) j= num[n-3] - '0';
        sum =A[j*10 +pos];
        printf("%d\n", sum);
    }    
}