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

Input: Consider Input: Sentence: 'a bowl of vegetables in a soup like substance next to a spoon'. Find frequency of the letter 'a'

Output: 5


Input: Consider Input: Sentence: 'a group of people are playing soccer on a beach'. Find frequency of the letter 'l'

Output: 2


Input: Consider Input: Sentence: 'a black table holding plates of food and silverware'. Find frequency of the letter 'c'


Output: 1