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

Input: Consider Input: Sentence: 'a glass vase sits between two statues'. Find frequency of the letter 'o'

Output: 1


Input: Consider Input: Sentence: 'a truck with a camper sits parked in some vegetation'. Find frequency of the letter 's'

Output: 3


Input: Consider Input: Sentence: 'the pair of soldiers cutting the cake were aided by a pair of hot mamas and a dweeb in a suit'. Find frequency of the letter 'm'


Output: 2