Looking for help with comparing outputs of a card game.

[weak raven]

Hello, I am currently trying to make a function to count the amount of pairs you would have in a hand of cards. I am having some trouble and just looking for a push in the right direction
https://gyazo.com/3118881e52aac7a4b2091a1fc310b384
https://gyazo.com/700e03b5f01d07529c6e3ca86d30b6ca
This is what I would like the output to be: https://gyazo.com/24194b7b1f5e8a76a8df54dbd1235f1c

[twilit ruin]

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[weak raven]

!solved