#include<stdio.h>
#include<string.h>
int sol[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,j,s,cf;
char n[1001];
int main()
{
    freopen("cifra.in","r",stdin);
    freopen("cifra.out","w",stdout);
    scanf("%d",&t);
    for (i=1;i<=t;i++)
    {
        scanf("\n");
        gets(n);
        cf=n[strlen(n)-1]-48;
        if (strlen(n)>1)
            cf+=(n[strlen(n)-2]-48)*10;
        printf("%d\n",sol[cf]);
    }
    return 0;
}