uses crt;
const
w1='a';
w2='bbb';
var
s:string;
i:integer;
begin
clrscr;
write('Stroka: ');
readln(s);
while Pos(w1,s)<>0 do begin
i:=Pos(w1,s);
Delete(s,i,Length(w1));
Insert(w2,s,i);
end;
writeln('New Stroka: ',s);
readln;
end.