Counting a’s (1)

Write a program that reads a sequence of characters ended with a period and prints the number of letters ‘a’ in the sequence.

Input

Input consists of a sequence of characters ended in a period.

Output

Print the number of times that ‘a’ appears in the sequence.

Problem information

Author: Unknown
Translator: Carlos Molina

Generation: 2026-01-25T12:15:59.773Z

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