Simple Python Solution
IntuitionApproachComplexity
Time complexity:

Space complexity:
Code
# Intuition
<!-- Describe your first thoughts on how to solve this problem. -->

# Approach
<!-- Describe your approach to solving the problem. -->

# Complexity
- Time complexity:
<!-- Add your time complexity here, e.g. $$O(n)$$ -->

- Space complexity:
<!-- Add your space complexity here, e.g. $$O(n)$$ -->

# Code
```python3 []
class Solution:
    def maximumNumberOfStringPairs(self, words: List[str]) -> int:
        used = set()
        res = 0

        for word in words:
            rev = word[::-1]

            if rev in used:
                res += 1
            else:
                used.add(word)
        
        return res
```
['Python3']