program SumDigits;

var
num, tens, ones, sum: Integer;

begin
writeln${}^{\prime }Enteratwo-digitnumber{:}^{\prime }$;
readln$num$;

if (num < 10) or (num > 99) then
writeln${}^{\prime }Pleaseenteratwo-digitnumber{.}^{\prime }$ else
begin
tens := num div 10;
ones := num mod 10;
sum := tens + ones;

end;
end.