In this task, you need to count the occurrences of the given word in the given sentence.

Ex Input:
Sentence: 'a reflection of a wild animal in a side view mirror'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'young teenage boy on his skateboard on the street with people on the curb'. Count the occurrences of the word 'on' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a group of people seated in chairs together and facing the same direction with one man holding a soccer ball in his hands'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2