#include <stdio.h>
#include <string.h>


int main() {

    freopen("cifra.in","r",stdin);
    freopen("cifra.out","w",stdout);

    int lastCif[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};

    int     T,i;
    char    nr[101];

    scanf("%d\n",&T);

    int last,prev;
    int len;

    for ( i = 0; i < T; i++) {
        scanf("%s",nr);
        len = strlen(nr);
        last = nr[len-1] - '0';
        if (len>1) prev = nr[len-2] - '0';
            else prev = 0;
        printf("%d\n",lastCif[((prev*10)+last)]);
    }

    return 0;
}