#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define NMAX 105;
const int nr[101]={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 n,i,k,p,cif;
	char s[105];


int main()

{
	freopen("cifra.in","r",stdin);
	freopen("cifra.out","w",stdout);
	
	scanf("%d\n",&p);
	
	for(i=1;i<=p;i++)
	{
	scanf("%s\n",&s);   
        if (strlen(s)==1)   
            cif=s[0]-'0';   
        else   
            cif=s[strlen(s)-1]-'0'+(s[strlen(s)-2]-'0')*10;     
	k = cif;
	
	printf("%d\n",nr[cif]);
	
	}
	//printf("%d",5405%20);
	return 0;
	
}