#include <stdio.h>
#include <stdlib.h>
int v[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};
int main()
{
	long int t,i;
	int j;
	char n[101],cif[2];
	FILE *f,*g;
	f=fopen("cifra.in","r");
	g=fopen("cifra.out","w");
	fscanf(f,"%d",&t);
	for(i=0;i<t;i++)
	{
		fscanf(f,"%s",&n);
		cif[0]=n[strlen(n)-1];
		cif[1]=n[strlen(n)];
		j=atoi(cif);
		fprintf(g,"%d\n",v[j]);
	}
	fclose(f);
	fclose(g);
	return 0;
}