### Tell us what’s happening:

I was informed by the system that I should have odd_digits = card_number_reversed [ : : 2] to be able to proceed. However, I could not properly understand why that is, I mean, I could not get the point of having every other digit within the card_number_reversed - what is that for?

Also, why should 2 digits be skipped, as we can see in the command?

### Your code so far

```
# 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
# User Editable Region
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()
```

### Your browser information:

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### Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 17