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

Input: Consider Input: Sentence: 'a close up of a plate with a whole carrot'. Find frequency of the letter 'w'

Output: 2


Input: Consider Input: Sentence: 'a construction sign is displayed on a street'. Find frequency of the letter 'i'

Output: 4


Input: Consider Input: Sentence: 'some food on plates next to each other on a table'. Find frequency of the letter 'e'


Output: 6