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

Input: Consider Input: Sentence: 'a bus is stopped in front of a graphic statue'. Find frequency of the letter 'e'

Output: 2


Input: Consider Input: Sentence: 'a picture of a toilet and toilet paper in a bathroom'. Find frequency of the letter 'o'

Output: 5


Input: Consider Input: Sentence: 'a lady sitting on a sidewalk by a parking meter'. Find frequency of the letter 'g'


Output: 2