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

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

Output: 2


Input: Consider Input: Sentence: 'A dog is sitting on a couch with it's head turned to look out of the window'. Count the number of verbs in this sentence.

Output: 4


Input: Consider Input: Sentence: 'A young man sitting on a couch with his head in his hands'. Count the number of verbs in this sentence.


Output: 1