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

Input: Consider Input: Sentence: 'a group of men standing around a table cutting a cake'. Find frequency of the letter 'g'

Output: 3


Input: Consider Input: Sentence: 'an audience watches as a bird spreads its wings'. Find frequency of the letter 'd'

Output: 3


Input: Consider Input: Sentence: 'a boy wearing a tan jacket eats a hot dog outdoors'. Find frequency of the letter 't'


Output: 5