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A correct month

Beginner

Python for kids 路 Lesson 28: Checking the data - before we calculate

Problem Statement

Read a month number. Print OK if it is from 1 to 12, otherwise BLAD.

Input Format

One whole number n (-1000 <= n <= 1000).

Output Format

OK or BLAD.

Examples
Example 1

Input

7

Output

OK
Example 2

Input

13

Output

BLAD