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

Input: Consider Input: Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'

Output: 1


Input: Consider Input: Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'

Output: 1


Input: Consider Input: Sentence: 'picketer on city street trying to praise her religion'. Find frequency of the letter 'h'


Output: 1