#include<stdio.h>
#include<string.h>
long a[]={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  t;
long x,i;
char n[102];
int main()
{
freopen("cifra.in","r",stdin);
freopen("cifra.out","w",stdout);

scanf("%i",&t);

for(i=1;i<=t;i++){
	     n[0]=0;
	     scanf("%s",&n);
	     long l;

	     l=strlen(n);

	     if(l>=2){
	     x=(n[l-2]-'0')*10+(n[l-1]-'0');
	       }
	     else x=n[l-1]-'0';
	     x=a[x];
	     printf("%i\n",x);
	      }
return 0;
}