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

Input: Consider Input: Sentence: 'a variety of a different type of vegetables'. Find frequency of the letter 't'

Output: 4


Input: Consider Input: Sentence: 'bananas are being dried in a tropical setting'. Find frequency of the letter 'i'

Output: 5


Input: Consider Input: Sentence: 'many traffic lights over a city road with a dark sky'. Find frequency of the letter 'a'


Output: 6