In this task, you need to count the number of nouns/verbs in the given sentence.

Input: Consider Input: Sentence: 'A bid walking on a stream of water next to green plants'. Count the number of verbs in this sentence.

Output: 1


Input: Consider Input: Sentence: 'A cat laying on top of a bench wearing a collar'. Count the number of verbs in this sentence.

Output: 2


Input: Consider Input: Sentence: 'a small river that flows between some buildings'. Count the number of verbs in this sentence.


Output: 1