#include <iostream>
#include <fstream>
#include <cstring>
#include <cstdlib>

using namespace std;

#define max 110

int a[] = { 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 };

char N[max];

int main()
{
	int T;
	
	ifstream f ("cifra.in");
	ofstream g ("cifra.out");

	f >> T;

	for (int i = 1; i <= T; ++i)
	{
		f >> N;
	    
	    int dim = strlen(N);
      
		char perioada[max];

		if (dim > 2)
			strcpy (perioada , N + dim - 2);

		else
			strcpy(perioada , N);
		
		int v = atol (perioada);
			g << a[v] << "\n";
    }         
	
	return 0;
}