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The password

Beginner

Python for kids 路 Lesson 27: Comparing text

Problem Statement

The club password is smok. Read a word and print OK if it is the right password, otherwise ZLE (wrong).

Input Format

One word (small letters only, no spaces).

Output Format

OK or ZLE.

Examples
Example 1

Input

smok

Output

OK
Example 2

Input

smoki

Output

ZLE