How many natural numbers consist of at least a digits and at most b digits?
Input
Two arbitrary natural numbers a and b are entered, separated by a space. Each does not exceed 10000.
Imprint
Print one number: the number of numbers that have the specified property.
Examples
| # |
Input |
Output |
| 1 |
1 2 |
99 |
| 2 |
1 1 |
9 |