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

Input: Consider Input: Sentence: 'a mixed bouquet of flowers in a glass vase set before a window'. Find frequency of the letter 'w'

Output: 3


Input: Consider Input: Sentence: 'man in a sleeping bag on the floor using a laptop computer'. Find frequency of the letter 'i'

Output: 3


Input: Consider Input: Sentence: 'a photo of two people swimming on surfboards'. Find frequency of the letter 'h'


Output: 1