# Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

### esta parte del código es rechazada, porqué (gracias)

Describe your issue in detail here.
if verify_card_number(translated_card_number):
print(valid)
else:
print(invalid)

### Your code so far

``````def verify_card_number(card_number):
sum_of_odd_digits = 0
card_number_reversed = card_number[::-1]
odd_digits = card_number_reversed[::2]

for digit in odd_digits:
sum_of_odd_digits += int(digit)

sum_of_even_digits = 0
even_digits = card_number_reversed[1::2]
for digit in even_digits:
number = int(digit) * 2
if number >= 10:
number = (number // 10) + (number % 10)
sum_of_even_digits += number
total = sum_of_odd_digits + sum_of_even_digits
print(total)
return total % 10 == 0

# User Editable Region

def main():
card_number = '4111-1111-4555-1142'
card_translation = str.maketrans({'-': '', ' ': ''})
translated_card_number = card_number.translate(card_translation)

if verify_card_number(translated_card_number):
print(VALID!)
else:
print(INVALID!)

# User Editable Region

main()
``````

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### Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

You appear to have created this post without editing the template. Please edit your post to Tell us what’s happening in your own words.

Are you printing strings or variables?

OK. I’ve deleted my previous posts 'cause I think the problem here could be that you are not passing those strings to your print calls inside the `if`.

Try to put your `VALID!` and `INVALID!` between quotation marks .

Hope this helps,
good coding.

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