#include <stdio.h>
#include <stdlib.h>

int v[101];

int main()
{
    int i,S=0,j;
    FILE *f=fopen("cifra.in","r");
    FILE *fp=fopen("cifra.out","w");
    int T,x,P;
    char c;


    fscanf(f,"%d",&T);

        for(i=1;i<=100;i++)
        {
            P=1;
            for(j=1;j<=i;j++) P=(P*i)%10;
            S=(S+P)%10;
            v[i]=S;
        }
        v[0]=v[100];



    for(i=0;i<T;i++)
    {
        c=getc(f);
        j=0;
        while((c=getc(f))!='\n')
        {
            j++;
        }
        if(j==1)
        {
            fseek(f,-2,SEEK_CUR);
        }
        else
        {
            fseek(f,-3,SEEK_CUR);
        }

        fscanf(f,"%d",&x);


        fprintf(fp,"%d\n",v[x%100]);
    }






    return 0;
}