Patterns Practice!

Can you figure out what comes next?

🟥 🟦 🟥 🟦 ___
🔺 🔺 🔵 🔺 🔺 ___
🟢 🟡 🟢 🟡 🟢 ___
1, 2, 1, 2, ___
A, B, A, B, ___
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