w o l v e s

# -*- coding -*- Utf-8 -*- #

#find a word in a string function

#---------------------------------#
def contains_word(s, w):
    return (' ' + w + ' ') in (' ' + s + ' ')
#---------------------------------#

list_with_words_and_letters = []
list_with_python = []
line = str(input())

while line != ".":
    # Checking if python in line

    if contains_word(line.lower(),"python") == True:

        list_with_words_and_letters.append(line) # appending the line in the list with words
        list_with_python.append("python")  # appending python in list

        line = str(input())

    elif contains_word(line.lower(),"python") == False:
        list_with_words_and_letters.append(line)  # appending the line in the list with words
        line = str(input())

    # If line is dot
    if line == ".":
        for words_and_letters in list_with_words_and_letters:
            print(words_and_letters[list_with_python.count("python") - 1],end=" ")  # printing letters of the line[count python]