Say what your player does each round, in plain words. Be specific about what it does first, how it reacts to defection, and whether it ever forgives.

For example: "Cooperate first. If they defect twice in a row, defect until they cooperate again. Every 20 rounds, defect once to test them."

Write a move(state) function that returns "C" or "D". The code guide shows what it can use.

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