Hearts and minds challenge

Your job is to take the HTML document that creates the following design:

hearts and minds bunch

And find out the following details:

How many of the hearts ❤️ and how many of the minds 🧠 are straight?
“straight” means they point fully up, down, left or right at a straight angle
How many minds 🧠 are on the left side of the bunch?
How many hearts ❤️ are on the right side of the bunch?
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