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

Input: Consider Input: Sentence: 'a full plate of food that includes rice and broccoli and carrots'. Find frequency of the letter 's'

Output: 2


Input: Consider Input: Sentence: 'a birthday cake with a number one and three candle'. Find frequency of the letter 'w'

Output: 1


Input: Consider Input: Sentence: 'a man standing in a kitchen with a large pan of batter'. Find frequency of the letter 'm'


Output: 1