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

Ex Input:
Sentence: 'a furry dog standing next to a fire hydrant'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man is holding a camera on a rig while skateboarding in a parking lot'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
4


Ex Input:
Sentence: 'many books are stacked on a bicycle in front of a bookstore'. Count the occurrences of the word 'bicycle' in the given sentence.

Ex Output:

1