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

Input: Consider Input: Sentence: 'soccer players on opposite teams fight for control over a ball'. Find frequency of the letter 't'

Output: 4


Input: Consider Input: Sentence: 'old double decker bus parked in a lot'. Find frequency of the letter 't'

Output: 1


Input: Consider Input: Sentence: 'a person hitting a tennis ball with a racquet on a tennis court'. Find frequency of the letter 'c'


Output: 2