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

Ex Input:
Sentence: 'A small white and brown dog carrying a red frisbee'. Count the number of nouns in this sentence.

Ex Output:
2


Ex Input:
Sentence: 'A lean, gray racehorse being led to a track'. Count the number of nouns in this sentence.

Ex Output:
2


Ex Input:
Sentence: 'a cat sits on a wood plank next to a boat'. Count the number of nouns in this sentence.

Ex Output:

4