#include<fstream>
#include<string>
using namespace std;

const int v[10][10]={{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}};

string s;
int i,n;

int main()
{
	ifstream f("cifra.in");
	ofstream g("cifra.out");
	f >> n;
	getline(f,s);
	for (i=1;i<=n;i++)
	{
		getline(f,s);
		if (s.size()==1)
		s='0'+s;
		g << v[s[s.size()-2]-'0'][s[s.size()-1]-'0'] << "\n";
	}
}