program cifra;

const a:array[0..9,0..9] 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[100];
    f,g:text;
    t,i:word;
    ln,uc,pc:byte;

begin
  assign(f,'cifra.in');
  reset(f);
  readln(f,t);
  assign(g,'cifra.out');
  rewrite(g);
  for i:=1 to t do
    begin
      readln(f,n);
      ln:=length(n);
      if ln >=2 then
        pc:=ord(n[ln-1])-48
      else
        pc:=0;
      uc:=ord(n[ln])-48;
      writeln(g,a[pc,uc]);
    end;
  close(f);
  close(g);
end.