uses crt;
var st,stnew:string;
k1,k2:integer;
begin
clrscr;
write('-> ');
readln(st);
k1:=1;
k2:=length(st);
while (k1<n) and (st[k1]<>'(') then inc(k1);
while (k2>1) and (st[k2]<>')') then dec(k2);
if (k1<k2) and (st[k1]='(') and (st[k2]=')') then
begin
stnew:=copy(st,k1,k2-k1+1);
writeln(stnew);
end else write('Ошибка ввода');
readln;
end.