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

Ex Input:
Sentence: 'a man is sitting in front of a computer at a desk'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'A large white polar bear eating a carrot'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'Two zebras standing near rocks behind a fence'. Count the number of nouns in this sentence.

Ex Output:

3