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

Ex Input:
Sentence: 'a truck and luggage sitting on a cart by the dining saloon car of a train'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a road sign on a corner in the snow'. Count the occurrences of the word 'in' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a plate with half sandwiches stacked on it sitting on a table in a restaurant'. Count the occurrences of the word 'sitting' in the given sentence.

Ex Output:

1