#include <fstream>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");

int main()
{
	int i,t,nr;
	char v[101];
	int  s[]={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}; 
	fin>>t;
	for(i=1;i<=t;i++)
	{
		fin>>v;
		nr=v[strlen(v)-1]-48;
		
		if(strlen(v)>1)
		//	nr+=(v[strlen(v)-2]-48)*10;
		fout<<s[nr]<<"\n";
	}
	fin.close();
	fout.close();
	return 0;
}