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

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: 'two indian women in colorful garb standing barefoot with two indian men'. Find frequency of the letter 'd'

Output: 3


Input: Consider Input: Sentence: 'a boat with a wooden stabilizer on a tropical beach'. Find frequency of the letter 'r'


Output: 2