var
  A: System.DateTime;
  i: byte;
  
begin
  readln(i);
  A := (new System.DateTime(1990, 1, 1)).AddMonths(i).AddDays(2);
  case A.DayOfWeek of
    System.DayOfWeek.Monday: writeln('ПН');
    System.DayOfWeek.Tuesday: writeln('ВТ');
    System.DayOfWeek.Wednesday: writeln('СР');
    System.DayOfWeek.Thursday: writeln('Чт');
    System.DayOfWeek.Friday: writeln('ПТ');
    System.DayOfWeek.Saturday: writeln('СБ');
    System.DayOfWeek.Sunday: writeln('ВС');
  end;
end.