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

Input: Consider Input: Sentence: 'a blue fire hydrant painted on the bottom of it'. Find frequency of the letter 'h'

Output: 2


Input: Consider Input: Sentence: 'a commuter bus in england by a clock tower building'. Find frequency of the letter 'w'

Output: 1


Input: Consider Input: Sentence: 'a stuffed bear is sitting next to some jars'. Find frequency of the letter 'x'


Output: 1