#include <fstream>
#include <cstring>
using namespace std;
ifstream fin ("cifra.in");
ofstream fout ("cifra.out");
int t,q,n,nr;
char s[105];
int v[]={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()
{
    /*int i,sum,j,s;
    for (i=1; i<=100; i++)
    {
        sum=1;
        for (j=1; j<=i; j++)
            sum=(sum*i)%10;
        s=(s+sum)%10;
        fout<<s<<",";
    }*/
    fin>>t;
    for (q=1; q<=t; q++)
    {
        fin>>s;
        n=strlen (s);
        n--;
        if (n==0)
            nr=s[0]-'0';
        else
            nr=(s[n-1]-'0')*10+s[n]-'0';
        if (nr==0)
            nr=100;
        fout<<v[nr]<<"\n";
    }
    return 0;
}