Three-digit number

How many unique three-digit numbers can be formed by using each digit of the given number exactly once?

Input

A single positive three-digit integer.

Output

The number of distinct three-digit numbers that can be formed.

Examples

Note

For example, from the number 123, you can create 6 different three-digit numbers: 123, 132, 213, 231, 312, 321. However, from the number 122, you can only form 3 distinct numbers: 122, 212, 221.