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

Input: Consider Input: Sentence: 'a woman fully dressed as a geisha'. Find frequency of the letter 'm'

Output: 1


Input: Consider Input: Sentence: 'a white paper plate with a slice of pizza on it'. Find frequency of the letter 'h'

Output: 2


Input: Consider Input: Sentence: 'a colorful umbrella falling from a tall building'. Find frequency of the letter 'd'


Output: 1