Paint Triangle

You are given two integers, base (b) and height (h), that describe an isosceles triangle. The triangle must be painted using a numerical pattern where each row i (1-indexed) is filled with the digit i.

The number of digits on row i follows the formula \(1+2(i-1)\), and the remaining spaces on each side of the digits are filled with the '-' character. The total width of each row is equal to b. It is guaranteed that the provided b and h yield a valid centered triangle.

For example, for b = 7 and h = 4 the triangle will be:

---1---
--222--
-33333-
4444444

Your task is to implement this logic and produce the corresponding painted triangle as the output.

inputFormat

The input consists of two integers read from stdin: the first integer denotes the base width b and the second integer denotes the height h of the triangle.

You can assume that the inputs are valid and that they form a valid isosceles triangle as described.

outputFormat

The output should be the painted triangle printed to stdout, where each line represents a row of the triangle. Each line should not contain any extra spaces or characters.

## sample

7
4

---1---
--222--
-33333-
4444444

</p>