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 throwing a frisbee on a field'. Find frequency of the letter 's'

Output: 1


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: 'a doll with huge eyes and black hair with blunt bangs holds a red umbrella'. Find frequency of the letter 'e'


Output: 5