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

Input: Consider Input: Sentence: 'A cardboard sign is stapled onto a tree on a street'. Count the number of verbs in this sentence.

Output: 1


Input: Consider Input: Sentence: 'there are a group elephants that can be seen in the wild'. Count the number of verbs in this sentence.

Output: 1


Input: Consider Input: Sentence: 'This dog is catching the frisbee  the owner threw to him'. Count the number of verbs in this sentence.


Output: 2