#include<fstream.h>

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

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