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

Input: Consider Input: Sentence: 'a tv in a glass mirror in the bathroom'. Find frequency of the letter 'h'

Output: 2


Input: Consider Input: Sentence: 'a man holding a baseball bat an playing baseball'. Find frequency of the letter 'l'

Output: 6


Input: Consider Input: Sentence: 'closeup of a yellow cake on a plate'. Find frequency of the letter 'f'


Output: 1