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

Ex Input:
Sentence: 'Three children are sitting with food in the park'. Count the number of nouns in this sentence.

Ex Output:
3


Ex Input:
Sentence: 'A group of volunteers enjoying a meal together'. Count the number of nouns in this sentence.

Ex Output:
3


Ex Input:
Sentence: 'a surfer walking in an ocean wave carrying a surf board'. Count the number of verbs in this sentence.

Ex Output:

2