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

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 young boy standing in front of a counter with dougnuts'. Find frequency of the letter 'o'

Output: 6


Input: Consider Input: Sentence: 'several sun bathing sections on the sand at a beach'. Find frequency of the letter 'a'


Output: 6