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

Ex Input:
Sentence: 'a woman holds a furry dog by its leash'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a big shaggy dog is tied up with its leash next to some stairs outside of a building'. Count the occurrences of the word 'shaggy' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'an old airfield with french officers talking and a two winged plane'. Count the occurrences of the word 'old' in the given sentence.

Ex Output:

1