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

Input: Consider Input: Sentence: 'a very big nice looking living room with nice furnishings'. Find frequency of the letter 'e'

Output: 3


Input: Consider Input: Sentence: 'this marketplace has a lot of fresh fruit and vegetables'. Find frequency of the letter 'v'

Output: 1


Input: Consider Input: Sentence: 'a small giraffe standing at a wood fence'. Find frequency of the letter 'e'


Output: 3