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

char c[102];

int main()
{
    int t=0,i=0,n=0,f=0;
    int s[100]={0, 1, 5, 2, 8, 3, 9, 2, 8, 9, 9, 0, 6, 9, 5, 0, 6, 3, 7, 8, 8, 9, 3, 0, 6, 1, 7, 0, 6, 7, 7, 8, 4, 7, 3, 8, 4, 1, 5, 6, 6, 7, 1, 8, 4, 9, 5, 8, 4, 5, 5, 6, 2, 5, 1, 6, 2, 9, 3, 4, 4, 5, 9, 6, 2, 7, 3, 6, 2, 3, 3, 4, 0, 3, 9, 4, 0, 7, 1, 2, 2, 3, 7, 4, 0, 5, 1, 4, 0, 1, 1, 2, 8, 1, 7, 2, 8, 5, 9, 0};
	freopen("cifra.in","r",stdin);
	freopen("cifra.out","w",stdout);
	scanf("%d\n",&t);
	for (i=0; i<t; ++i)
	{
        fgets(c,101,stdin);
        n=strlen(c);
        if (n>2) f=10*((int)c[n-3]-48)+((int)c[n-2]-48);
		else f=(int)c[0]-48;
		printf("%d\n",s[f%100]);
    }
	return 0;
}