#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ofstream g("cifra.out");
/*int sum(int x,int p)  // GENERAREA numerelor pana la 100, ultima cifra, dupa 100 se repeta //
{
    if(x==1||p==0)
        return 1;
    else
    if(x==2)
    {

        if(p%4==0)
            return 6;
        else
            if(p%4==1)
            return 2;
        else
            if(p%4==2)
            return 4;
        else
            if(p%4==3)
            return 8;
    }
    else
    if(x==3)
    {
        if(p%4==0)
            return 1;
        else
            if(p%4==1)
            return 3;
        else
            if(p%4==2)
            return 9;
        else
            if(p%4==3)
            return 7;
    }
    else
    if(x==4)
    {
        if(p%2==0)
            return 6;
        else
            if(p%2==1)
            return 4;
    }
    else
    if(x==5)
        return 5;
    else
        if(x==6)
    return 6;
    else
        if(x==7)
    {
        if(p%4==0)
            return 1;
        else
            if(p%4==1)
            return 7;
        else
            if(p%4==2)
            return 9;
        else
            if(p%4==3)
            return 3;
    }
    else
        if(x==8)
    {
        if(p%4==0)
            return 6;
        else
            if(p%4==1)
            return 8;
        else
            if(p%4==2)
            return 4;
        else
            if(p%4==3)
            return 2;
    }
    else
        if(x==9)
    {
        if(p%2==0)
            return 1;
        else
            if(p%2==1)
            return 9;
    }

}
int main()
{
    int i,s=0,j;
    g<<0<<",";
    for(i=1;i<=200;i++)
    {
        s=0;
        for(j=1;j<=i;j++)
        {
            s=s+sum(j%10,j)%10;

        }
        g<<s%10<<",";
        if(i==100)
        {
            g<<endl;
            g<<0<<",";
        }
    }
    return 0;
}*/
const int vec[]={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()
{
    ifstream f("cifra.in");
    char nr[110],n;
    int T;
    f>>T;
    for(int i=1;i<=T;i++)
    {
        f>>nr;
        n=nr[strlen(nr)-1]-'0';
        if(strlen(nr)>=2)
            n=n+10*(nr[strlen(nr)-2]-'0');
        g<<vec[n]<<'\n';

    }
}