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

Ex Input:
Sentence: 'We are looking down at the skis of a skier riding a ski lift'. Count the number of verbs in this sentence.

Ex Output:
2


Ex Input:
Sentence: 'Pedestrians stand at a crosswalk waiting for the light to change'. Count the number of nouns in this sentence.

Ex Output:
3


Ex Input:
Sentence: 'A man in green feeding an elephant a bottle'. Count the number of verbs in this sentence.

Ex Output:

1