#include<fstream.h>

long long nr,t,i,j,k[100]={1,5,2,8,3,9,2,8,7,8,9,3,0,6,1,7,0,6,5,6,7,1,8,4,9,5,8,4,3,4,5,9,6,2,7,3,6,2,1,2,3,7,4,0,5,1,4,0,9,0,1,5,2,8,3,9,2,8,7,8,9,3,0,6,1,7,0,6,5,6,7,1,8,4,9,5,8,4,3,4,5,9,6,2,7,3,6,2,1,2,3,7,4,0,5,1,4,0,9,0};
char c;

int main()
{	ifstream fin("cifra.in");
	ofstream fout("cifra.out");
	fin>>t;
	for(i=1;i<=t;i++)
	{       fin>>c;nr=c-48;
		while(c!='\n'&&!fin.eof())
		{	fin>>c;
			nr=nr*10+(c-48);
			nr%=10;
		}
		fout<<k[nr]<<'\n';
	}
	return 0;
}