Split function - comparing lists

I’m trying to ask make to compare 2 lists and then return a numerical value that tell me how many matching values are in those lists.

The data includes 2 people’s growth areas:

Person a
Effective communication, Influence and persuasion, Strategic thinking, Service operational management

Person b
Confidence, Effective communication, Strategic thinking, Leadership

The formula should be returning a ‘2’ but I’m getting a 0.

Any help much appreciated!

Solved it! The spaces in “,” were throwing me off!

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