Sometimes one has to spell email addresses over the phone. Then one usually pronounces a dot as dot, an at sign as at. As a result, we get something like vasyaatgmaildotcom. Your task is to transform it into a proper email address ([[email protected]](/cdn-cgi/l/email-protection)). 

It is known that a proper email address contains only such symbols as . @ and lower-case Latin letters, doesn't start with and doesn't end with a dot. Also, a proper email address doesn't start with and doesn't end with an at sign. Moreover, an email address contains exactly one such symbol as @, yet may contain any number (possible, zero) of dots. 

You have to carry out a series of replacements so that the length of the result was as short as possible and it was a proper email address. If the lengths are equal, you should print the lexicographically minimal result. 

Overall, two variants of replacement are possible: dot can be replaced by a dot, at can be replaced by an at.
The first line contains the email address description. It is guaranteed that that is a proper email address with all the dots replaced by dot an the at signs replaced by at. The line is not empty and its length does not exceed 100 symbols.
s=input()
l = []
k = set()
s=s.replace("dot",".")
if s[0] == ".":
    s = s.replace(".","dot",1)
if s[-1] == ".":
    s = s.replace(".","dot",1)
while True:
    pos = None
    current_str = ""

    s = list(s.replace("at","@"))
    for i in range(len(s)):
        if s[i] == "@":
            pos = i
            if pos in k:
                continue
            else:
                k.add(pos)
                break
    for i,e in enumerate(s):
        if e == "@":
            if i == pos:
                current_str += "@"
            else:
                current_str += "at"
        else:
            current_str += e
    try:
        if current_str == l[-1]:
            break
    except: pass
    l.append(current_str)
    s = current_str.replace("@","at")
l = sorted(l)
if l[0][-1] == "@":
    print(l[1])
else:
    print(l[0])
    
    