In this task, you need to count the number of times the given letter appears in the given sentence.

Input: Consider Input: Sentence: 'two elephants facing each other touching trunks in an enclosure'. Find frequency of the letter 'f'

Output: 1


Input: Consider Input: Sentence: 'a gray colored pigeon that is perched on a railing outside of a building, with other buildings in the background'. Find frequency of the letter 'e'

Output: 7


Input: Consider Input: Sentence: 'a flower that looks like a large bunch of bananas'. Find frequency of the letter 'w'


Output: 1