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

Input: Consider Input: Sentence: 'this marketplace has a lot of fresh fruit and vegetables'. Find frequency of the letter 'v'

Output: 1


Input: Consider Input: Sentence: 'people playing wii bowling in a modern library'. Find frequency of the letter 'o'

Output: 3


Input: Consider Input: Sentence: 'the skiers are standing for a group photo'. Find frequency of the letter 'h'


Output: 2