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

Input: Consider Input: Sentence: 'a  woman standing next to a man on a motorcycle in front of a market'. Find frequency of the letter 'l'

Output: 1


Input: Consider Input: Sentence: 'soccer players on opposite teams fight for control over a ball'. Find frequency of the letter 't'

Output: 4


Input: Consider Input: Sentence: 'a single ram standing on a grassy hill'. Find frequency of the letter 'a'


Output: 5