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

Ex Input:
Sentence: 'mounds of plantains are on display at market stalls'. How many words start with the letter 'm' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'young lady sitting on a bicycle rickshaw talking on the phone'. How many words start with the letter 's' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a brick home and sidewalk with an unattended lawn'. How many words start with the letter 'a' in the sentence.

Ex Output:

3


