Check Specific Substring

Background

Congcong has recently been studying some special string patterns. He discovered an interesting rule and needs your help to determine if a given string conforms to this rule.

Problem Description

Return true if the given string contains an appearance of "xyz" where the "xyz" is not directly preceded by a period (.). So "xxyz" counts but "x.xyz" does not.

Input Format

Input is given from standard input in the following format.

A single string $S$.

Output Format

Output is printed to standard output in the following format.

Output "true" if the string meets the condition; otherwise, output "false".

Sample

abcxyz

true

abc.xyz

false

xyz.abc

true

Sample Explanation

For the first sample "abcxyz\