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

Ex Input:
Sentence: 'an older fighter plan sitting next to a group military men'. How many words contain the letter 'y' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'zebra eating from the ground near a tree'. How many words contain the letter 'k' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a swan swimming next to a snowcovered rocky shore'. How many words contain the letter 'o' in the sentence.

Ex Output:

4