1 + 1 + 1 + 1 = 4 → FOUR
2 + 2 + 2 + 2 = 8 → EIGHT
3 + 3 + 3 + 3 = 12 → TWELVE
4 + 4 + 4 + 4 = 16 → SIXTEEN
5 + 5 + 5 + 5 = 20 →TWENTY
Answer: 5 + 5 + 5 + 5 = Y
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