#include<fstream.h>

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

int main()
{	ifstream fin("cifra.in");
	ofstream fout("cifra.out");
	fin>>t;
	for(i=1;i<=t;i++)
		while(!fin.eof())
		{	fin.get(c);
			if(c!='\n')rasp[j++]=c-48;
			else fout<<k[rasp[j-2]*10+rasp[j-1]-1]<<'\n';
		}
	return 0;
}