# Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 24

### Tell us what’s happening:

not sure why it doesn’t work when the program does what its supposed to be doing.

``````
/* User Editable Region */

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)
print(sum_of_odd_digits)

sum_of_even_digits = 0
even_digits = card_number_reversed[1::2]
for i in even_digits:
print (i)

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

verify_card_number(translated_card_number)

main()

/* User Editable Region */

``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`
here remove the space between `print` and `(i)`. No need for space.