Test Cases
7
数列の項数:34
8
f("Cats do meow-meow while lions do not meow.", "meow", 2)
9
10
f("Cats do not memeowow, they do meow-ing.", "meow", 2)
11
12
f("Cats do meow-meow while lions do not meow.", "meow", 4)
13
14
15
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