Help with a substring length 2

Question

I was practicing Python and came across this task. I can’t understand why
last2(‘axxxaaxx’) Is returning 2
Çan someone explain please?

The task:
Given a string, return the count of the number of times that a substring length 2 appears in the string and also as the last 2 chars of the string, so "hixxxhi" yields 1 (we won't count the end substring).

last2('hixxhi') → 1
last2('xaxxaxaxx') → 1
last2('axxxaaxx') → 2

https://codingbat.com/prob/p145834

Answer 1

The function should count overlapping occurrences of the substring.

aXXxaaxx
axXXaaxx

Answer 2

I got you, thank you Diego