var a:integer;
begin
writeln('введите номер месяца');readln(a);
if (a>=1) and (a<=2) and (a=12) then writeln('зима');
if (a>=3) and (a<=5) then writeln('весна');
if (a>=6) and (a<=8) then writeln('лето');
if (a>=9) and (a<=11) then writeln('осень')else writeln('error');
end.