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

Input: Consider Input: Sentence: 'two baseball players high five each other during a game'. Find frequency of the letter 'y'

Output: 1


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

Output: 1


Input: Consider Input: Sentence: 'two glasses of wine being poured next to a female'. Find frequency of the letter 'i'


Output: 2