#include<stdio.h>
#include<string.h>
int a[10][5]={{0,0,0,0,0},
                {1,1,1,1,1},
                {1,2,4,8,6},
                {1,3,9,7,1},
                {1,4,6,4,6},
                {1,5,5,5,5},
                {1,6,6,6,6},
                {1,7,9,3,1},
                {1,8,4,2,6},
                {1,9,1,9,1}},i,t,m,nr;
int cifra[100]={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};
char n[102];
int main()
{freopen("cifra.in","r",stdin);
 freopen("cifra.out","w",stdout);
 char c;
 scanf("%d%c",&m,&c);
 for(i=1;i<=m;i++)
 {scanf("%s",&n);
  if(strlen(n)>1) nr=(int)(n[strlen(n)-2]-48)*10+(int)(n[strlen(n)-1]-48);
  else nr=(int)n[0]-48;
  printf("%d\n",cifra[nr%100]);}
 fclose(stdout);
 return 0;}