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

Input: Consider Input: Sentence: 'a doll with huge eyes and black hair with blunt bangs holds a red umbrella'. Find frequency of the letter 'e'

Output: 5


Input: Consider Input: Sentence: 'a woman standing in front of a bathroom sink in front of a mirror'. Find frequency of the letter 'o'

Output: 8


Input: Consider Input: Sentence: 'an image of group of people to motorcycles'. Find frequency of the letter 'e'


Output: 4