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

Ex Input:
Sentence: 'A man and children are riding on the back of an elephant'. Count the number of nouns in this sentence.

Ex Output:
4


Ex Input:
Sentence: 'A man riding skis across snow covered ground'. Count the number of verbs in this sentence.

Ex Output:
2


Ex Input:
Sentence: 'A couple of tables and chairs with umbrellas'. Count the number of verbs in this sentence.

Ex Output:

0