stream_of_letters

list_words = []
c = 0
o = 0
n = 0
cc = False
oo = False
nn = False
check_last_word = True
while True:
    letter = input()    # c, o, n срещнат ли се по 1 път се изписва дума,
    if letter == 'End':
        check_last_word = False
        break
    if letter == 'c':
        c += 1
        cc = True
        if c > 1:
            list_words.append(letter)
    elif letter == 'o':
        o += 1
        oo = True
        if o > 1:
            list_words.append(letter)
    elif letter == 'n':
        n += 1
        nn = True
        if n > 1:
            list_words.append(letter)
    else:
        if letter.isalpha():
            list_words.append(letter)
    if cc and oo and nn:
        list_words.append(' ')
        cc = False
        oo = False
        nn = False
        c = 0
        o = 0
        n = 0
if not check_last_word:
   for y in range(len(list_words) - 1, 0 - 1, -1):
        if list_words[y] != ' ':
            list_words.pop()
        elif list_words[y] == ' ':
            break

for x in list_words:
        print(x, end='')