package main

import (
	"bufio"
	"fmt"
	"os"
	"regexp"
)

func main() {
	var sc = bufio.NewScanner(os.Stdin)
	sc.Buffer(make([]byte, 0, 100000+2), 100000+2)
	sc.Scan()
	T := sc.Text()

	r := regexp.MustCompile(`\(.*\)`)
	S := r.ReplaceAllString(T, "@")

	fmt.Println(S)
}