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

Input: Consider Input: Sentence: 'the man is holding a plastic sled with snow in it next to a child'. Find frequency of the letter 'g'

Output: 1


Input: Consider Input: Sentence: 'a blue tripocal bird is perched on a wooden fence'. Find frequency of the letter 'd'

Output: 3


Input: Consider Input: Sentence: 'two orange flowers sitting in a glass of water'. Find frequency of the letter 'f'


Output: 2