instruction:
In this task, you need to count the number of words in a sentence that contain the given letter
question:
Sentence: 'a man walking with rolling luggage and many bags'. How many words contain the letter 'g' in the sentence.
answer:
4


question:
Sentence: 'a man sits on a bench with a dog in lap reading'. How many words contain the letter 'x' in the sentence.
answer:
0


question:
Sentence: 'people and two draught horses walking across a green field'. How many words contain the letter 'k' in the sentence.
answer:

1