program wxx;

Var
	count : Integer;
	ch1, ch2 : Char;
	s : string;
	
Begin
	count := 0;
	For ch1 := 'a' to 'z' do begin
		For ch2 := 'a' to 'z' do begin
			inc(count);
			s := '.w'+ch1+ch2+' ';
			Write(s);
			If Count = 13 then begin
				Writeln;
				count := 0;
			End;
		End;
	End;
	Writeln;
End.