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

Input: Consider Input: Sentence: 'there is an old stove with old pots on the burners'. Find frequency of the letter 't'

Output: 5


Input: Consider Input: Sentence: 'a group of men standing on the side of a boat'. Find frequency of the letter 'o'

Output: 5


Input: Consider Input: Sentence: 'a woman fully dressed as a geisha'. Find frequency of the letter 'm'


Output: 1