Looking for an a

Write a program that reads a sequence of characters ended in a dot and tells if the sequence has any lowercase ‘a’ or not.

Input

Input consists of a sequence of characters ended in ‘.’.

Output

Print “yes” or “no” depending on whether ‘a’ appears in the sequence or not.

Problem information

Author: Unknown
Translator: Carlos Molina

Generation: 2026-01-25T11:50:27.797Z

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