Find Fuzzy 'bob'

Background

Congcong is currently learning about string processing. He encountered an interesting problem that requires determining if a string contains a substring of a specific pattern.

Problem Description

Return true if the given string contains a substring that starts with 'b', ends with 'b', and has a length of 3. Otherwise, return false.

Input Format

Input is given from standard input in the following format.

s

Output Format

Output is printed to standard output in the following format.

Output true if the string contains such a substring; otherwise, output false.

Sample

abcbob

true

b9b

true

bac

false

Sample Explanation

Sample 1: The string "abcbob" contains the substring "bob\