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

Ex Input:
Sentence: 'Two boats are docked at the bank of a river'. Count the number of nouns in this sentence.

Ex Output:
3


Ex Input:
Sentence: 'A person is fixing a sail on a boat'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'Three stories brownstone is overlooking quiet, tree-lined street'. Count the number of verbs in this sentence.

Ex Output:

2