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

Input: Consider Input: Sentence: 'a white and blue plate topped with meat and a salad'. Find frequency of the letter 'u'

Output: 1


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: 'people in a living room with flower arrangements near the clock'. Find frequency of the letter 'e'


Output: 7