import sys
line = sys.argv[1:]
phrase = []
for word in line:
    word = word.lower()
    word = list(word)
    for c in word:
        if c.isalpha():
            phrase.append(c)
print(phrase == phrase[::-1])

2164bfa23b3b8503c2022e0856c5bff5324103d7
<mask token>

<mask token>
for word in line:
    word = word.lower()
    word = list(word)
    for c in word:
        if c.isalpha():
            phrase.append(c)
print(phrase == phrase[::-1])

<mask token>
line = sys.argv[1:]
phrase = []
for word in line:
    word = word.lower()
    word = list(word)
    for c in word:
        if c.isalpha():
            phrase.append(c)
print(phrase == phrase[::-1])

import sys
line = sys.argv[1:]
phrase = []
for word in line:
    word = word.lower()
    word = list(word)
    for c in word:
        if c.isalpha():
            phrase.append(c)
print(phrase == phrase[::-1])
