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

Input: Consider Input: Sentence: 'a man hits a tennis ball with a racket on the court'. Find frequency of the letter 'c'

Output: 2


Input: Consider Input: Sentence: 'a toilet sits in a cluttered bathroom next to a sink'. Find frequency of the letter 'a'

Output: 4


Input: Consider Input: Sentence: 'adult and baby elephants depicted in a stampede'. Find frequency of the letter 'h'


Output: 1