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 couple of buses parked on the side of the street'. Find frequency of the letter 'b'

Output: 1


Input: Consider Input: Sentence: 'a woman throwing a pink frisbee in the field'. Find frequency of the letter 'o'


Output: 2