#include <cstdio>
#include <cstdlib>
#include <cstring>

#define fr(i, a, b) for(int i=a; i<b; ++i)

int c, t[100] = { 0, 1, 5, 2, 8, 3, 9, 2, 8, 7, 7, 8, 6, 9, 5, 0, 6, 3, 7, 6, 6, 7, 1, 8, 4, 9, 5, 8, 4, 3, 3, 4, 2, 5, 1, 6, 2, 9, 3, 2, 2, 3, 7, 4, 0, 5, 1, 4, 0, 9, 9, 0, 8, 1, 7, 2, 8, 5, 9, 8, 8, 9, 3, 0, 6, 1, 7, 0, 6, 5, 5, 6, 4, 7, 3, 8, 4, 1, 5, 4, 4, 5, 9, 6, 2, 7, 3, 6, 2, 1, 1, 2, 0, 3, 9, 4, 0, 7, 1, 0 };
char s;
char *a;
char b[1000];
char d[2];
int el;

int main()
{
	freopen("cifra.in", "r", stdin);
	freopen("cifra.out", "w", stdout);
	scanf("%d", &c);

	fr(i, 0, c)
	{
		scanf("%s", b);
		el = strlen(b);
		if (el<3) printf("%d\n", t[atoi(b)]);
		else
		{
			d[0] = b[el-2];
			d[1] = b[el-1];
			printf("%d\n", t[atoi(d)]);
		}
	}

	return 0;
}