#include <iostream> 
#include <fstream>
#include <iomanip>
#include <cmath>
#include <algorithm> 
#include <cstring>

using namespace std;

string NumeFisier = "cifra";

ifstream fin(NumeFisier + ".in");
ofstream fout(NumeFisier + ".out");

typedef unsigned long long int ull;
int cif[] = { 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 poww(int baza, int exp)
{
	int rez = 1;
	for (int i = 1; i <= exp; i++)
	{
		rez = rez * baza % 10;
	}
	return rez;
}

int main()
{


	int T;
	fin >> T;
	fin.get();
	char numar[256];

	for (int i = 1; i <= T; i++)
	{
		fin >> numar;
		int len = strlen(numar);
		if (len == 1)
		{
			fout << cif[numar[0] - '0'] << '\n';
		}
		else
		{
			int uc = numar[len - 1] - '0';
			int pc = numar[len - 2] - '0';
			fout << cif[pc * 10 + uc] << '\n';
		}
	}
}