program Project7;
{$APPTYPE CONSOLE}
var A,B,C,S:integer;
begin
WRITELN('Vvedit 3 chysla');
readln(A,B,C);
writeln('Vvedit sumu');
readln(S);
if (A+B+C)=S then 
writeln('Pravylno ',A+B+C) else
writeln('Ne pravylno. Pravylno ',A+B+C);
readln;
end.