const v:array[0..99] of byte=(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);
	
var n:string[105];

procedure cifra;
var t,a,b,p,i,er,l:longint;

begin
	assign(input,'cifra.in');reset(input);
	assign(output,'cifra.out');rewrite(output);
	readln(t);
	for i:=1 to t do
	begin
		readln(n);
		l:=length(n);
		val(n[l-1],a,er);
		val(n[l],b,er);
		p:=a*10+b;
		
		writeln(v[p]);
	end;
	
	close(input);close(output);
end;

BEGIN

cifra;

END.