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

Input: Consider Input: Sentence: 'two pepperoni pizzas and a cup on a counter'. Find frequency of the letter 'u'

Output: 2


Input: Consider Input: Sentence: 'a doll with huge eyes and black hair with blunt bangs holds a red umbrella'. Find frequency of the letter 'e'

Output: 5


Input: Consider Input: Sentence: 'a large glass vase with many types of flowers'. Find frequency of the letter 't'


Output: 2