In this task, you need to count the number of words in a sentence that contain the given letter

Ex Input:
Sentence: 'a horse and a donkey stand in a fenced field'. How many words contain the letter 'd' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a car stopped at a red light at an intersection'. How many words contain the letter 'l' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a passenger bus is parked outside in the daytime'. How many words contain the letter 'd' in the sentence.

Ex Output:

3