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 = [i for i in s]
l.append('.')
l.append('.')
l.append('.')
n = len(s)
p = []
p.append(s[0])
i = 1
f=0
while i<n:
    if s[i]=='d' and s[i+1]=='o' and s[i+2]=='t':
        p.append('.')
        i+=2
    elif s[i]=='a' and s[i+1]=='t' and f==0:
        p.append('@')
        f=1
        i+=1
    else:
        p.append(s[i])
    i+=1
#print(p)
if p[-1]=='.':
    p.pop()
    p.append('d')
    p.append('o')
    p.append('t')
print(''.join(p))

