def solve():
    t = input()
    s = ""
    flg = False
    for i in range(len(t)):
        if not flg:
            if t[i] == "(":
                flg = True
                s += "@"
                continue
            s += t[i]
        else:
            if t[i] == ")":
                flg = False
    return s
print(solve())