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

Input: Consider Input: Sentence: 'a man holding a brown paper bag kite'. Find frequency of the letter 'b'

Output: 2


Input: Consider Input: Sentence: 'a tower with some bright lights and clocks on it'. Find frequency of the letter 'h'

Output: 3


Input: Consider Input: Sentence: 'a mountain range with skiers going down the slope'. Find frequency of the letter 'm'


Output: 1