Remove Unlucky Patterns

Background

Congcong has recently been studying strings. He discovered that certain string patterns bring bad luck.

Problem Description

Suppose a string pattern of the form "yXk" is considered unlucky, where 'X' can be any character. Given a string, return a new version where all unlucky "yXk" patterns have been removed. It is guaranteed that these unlucky patterns will not overlap in the original string.

Input Format

Input is given from Standard Input in the following format.

A string $S$.

Output Format

Output is printed to Standard Output in the following format.

The string after removing all unlucky patterns.

Sample

yakpak

"pak"

pakyak

"pak"

yak123ya

"123ya"

Sample Explanation

For the first sample, the string "yakpak" contains "yak\