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def num_to_word(x): # [too-many-branches] if x == 0: return "zero" elif x == 1: return "one" elif x == 2: return "two" elif x == 3: return "three" elif x == 4: return "four" elif x == 5: return "five" elif x == 6: return "six" elif x == 7: return "seven" elif x == 8: return "eight" elif x == 9: return "nine" else: return None