class Main{
    public static void main(String[] args)throws java.io.IOException{
        int c;
        while((c=System.in.read())!='\n'){
            if(c=='('){
                while(c!=')')
                    c = System.in.read();
                c = '@';
            }
            System.out.print((char)c);
        }
        System.out.println();
    }
}