text = input()
text = text.lower()
words = text.split(" ")
for word in words:
    if word[0] == "www.":
        print(word[0])

e9948f331e0a001969b7c1ed9c7ac5ca05cdd918
<mask token>

<mask token>
for word in words:
    if word[0] == 'www.':
        print(word[0])

text = input()
text = text.lower()
words = text.split(' ')
for word in words:
    if word[0] == 'www.':
        print(word[0])

text = input()
text = text.lower()
words = text.split(" ")
for word in words:
    if word[0] == "www.":
        print(word[0])
