Competitions

# PP1 Week 2 Conditionals Part 2

# One-digit number

Integer **n** is given. Print **Ok**, if **n** is one-digit number and **No** otherwise.

#### Input

One integer **n**.

#### Output

Print **Ok**, if **n** is one-digit number and **No** otherwise.

Input example #1

7

Output example #1

Ok

Input example #2

-77

Output example #2

No