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

Input: Consider Input: Sentence: 'a bowl of vegetables in a soup like substance next to a spoon'. Find frequency of the letter 'a'

Output: 5


Input: Consider Input: Sentence: 'a view from a bathroom shows an open door'. Find frequency of the letter 'o'

Output: 7


Input: Consider Input: Sentence: 'skiers make their way down the trail through some trees'. Find frequency of the letter 'k'


Output: 2