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

Ex Input:
Sentence: 'a group of kids swimming in ocean around a man on a surfboard'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man is looking slyly at the camera while sitting at his laptop at a desk'. Count the occurrences of the word 'at' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a young boy about to take off his helmit after playing baseball'. Count the occurrences of the word 'playing' in the given sentence.

Ex Output:

1