shag_2019_11_tip_2

from math import factorial

word = word_out = ' ' + input() + ' '

for i in set(word.split()):
    len_i = len(i)

    TF = False
    if len_i == 1:
        TF = True
    elif len_i % 2 == 0:
        for j in range(10000):
            factorial_j = factorial(j)
            if factorial_j > len_i:
                break
            elif factorial_j == len_i:
                TF = True
                break

    if TF:
        word_out = word_out.replace(f' {i} ', '  ')

print(word_out[1:-1])