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

Input: Consider Input: Sentence: 'a person riding a camel in front of a truck'. Find frequency of the letter 't'

Output: 2


Input: Consider Input: Sentence: 'two elephants facing each other touching trunks in an enclosure'. Find frequency of the letter 'f'

Output: 1


Input: Consider Input: Sentence: 'a living room with white walls and wood flooring'. Find frequency of the letter 'i'


Output: 5