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

Input: Consider Input: Sentence: 'a man with a white surfboard riding a small wave'. Count the number of verbs in this sentence.

Output: 1


Input: Consider Input: Sentence: 'A family walking towards a very small airplane'. Count the number of verbs in this sentence.

Output: 1


Input: Consider Input: Sentence: 'A man shows a kid how to cut something on a boat'. Count the number of verbs in this sentence.


Output: 2