Substring Count Equality Check

Background

Congcong is currently learning about string processing. He encountered an interesting problem that requires checking if the number of occurrences of specific substrings in a given string are equal.

Problem Description

Given a string, return true if the number of appearances of "is" anywhere in the string is equal to the number of appearances of "not" anywhere in the string (case sensitive); otherwise, return false.

Input Format

Input is given from standard input in the following format.

A single line containing string $S$.

Output Format

Output is printed to standard output in the following format.

Output true if the number of occurrences of "is" equals the number of occurrences of "not"; otherwise, output false.

Sample

This is not

false

This is notnot

true

noisxxnotyynotxisi

true

Sample Explanation

Sample 1: In the string "This is not\