In this task, you need to count the number of words in a sentence that end with the given letter. Answer with numbers and not words.

[EX Q]: Sentence: 'a pair of cows are grazing in a field'. How many words end with the letter 'd' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a snowboarder buried up to his waste in snow'. How many words end with the letter 'o' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'an old lady and a young man play wii while another youngster watches from a chair'. How many words end with the letter 'r' in the sentence.
[EX A]:
3