Three-digit number

Input

A single positive three-digit integer $n$.

Output

Print the answer to the problem — the number of different 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: $122$, $212$, $221$.