＃第三题 ac
letterlist = "1234567890qwertyuiopasdfghjklzxcvbnm&=+$,;?/-_.!~*'()#QWERTYUIOPASDFGHJKLZXCVBNM"
string = raw_input()
start = 0
end = 0
result = []
last_end = -1
for i in range(len(string)):
	if string[i] == "@":
		start = i
		continue
	if string[i] == ".":
		end = i
		if (end - start + 1 - 2) <= 119:
			start3 = start - 3
			# print start3
			if start3 < 0 or start3 <= last_end:
				last_end = end
				continue
			else:
				last_end = end
				test_string = string[start3:start]
				flag = 0
				for letter in test_string:
					if letter not in letterlist and letter != "@":
						flag = 1
				if (flag == 1):
					continue
				else:
					result.append(start3)
					result.append(start3+1)
					result.append(start3+2)
	else:
		continue
final = ""
for i in range(len(string)):
	if i in result:
		final += "*"
	else:
		final += string[i]

print final