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

Output: 3


Input: Consider Input: Sentence: 'there are a pink pair of sneakers and a pink frisbee'. Find frequency of the letter 'i'


Output: 4