#include <stdio.h>
#include <cstring>
#include <string>

using namespace std;
FILE *f,*g;

int v[52]={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};
///ultima cifra a sumelor se repeta din 100 in 100 de termeni
///de ex u(1^1+...+98^98)=1, adica 100%98=98, adica v[98] care e egal cu 1;
char c[202];

int main()
{
    int m,n,i,nr,lg;
    f=fopen("cifra.in","r");
    g=fopen("cifra.out","w");
    fscanf(f,"%d",&m);
    for(i=1;i<=m;i++)
    {
        fscanf(f,"%d",&c);
        lg=strlen(c);
        if(lg==1)
        {
           nr=c[0];
           fprintf(g,"%d\n",v[nr]);
        }
        else
        {
            lg--;
            nr=c[lg]+c[lg-1]*10;
            fprintf(g,"%d\n",v[nr]);
        }
    }
    fclose(f);
    fclose(g);
    return 0;
}