#include <fstream>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");
int i, t;
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};
char n[110];
int main()
{
    fin>>t;
    for(i=1;i<=t;i++)
    {
         fin>>n;
         int l=strlen(n);
         char last2[110];
         if(l>2)
            strcpy(last2,n+l-2);
         else
            strcpy(last2,n);
         int v=atoi(last2);
         fout<<a[v]<<"\n";
    }
    return 0;
}