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: 'the woman is standing in the rain with her umbrella'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a bed with a wooden chest of drawers on it'. How many words start with the letter 'o' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'two chaits an umrella and two people at abeach'. How many words start with the letter 'a' in the sentence.

Ex Output:

4