Problem Statement

Print the color of the cell at the R-th row from the top and C-th column from the left
in the following grid with 15 vertical rows and 15 horizontal columns.

Input

Input is given from Standard Input in the following format:
R C

Output

In the grid above, if the color of the cell at the R-th row from the top and C-th column from the left is black, then print black; if the cell is white, then print white. Note that the judge is case-sensitive.

Constraints

• $1 \leq R, C \leq 15$
• R and C are integers.

Sample Input 1

3 5

Sample Output 1

black

In the grid above, the cell at the 3-rd row from the top and 5-th column from the left is black. Thus, black should be printed.

Sample Input 2

4 5

Sample Output 2

white

In the grid above, the cell at the 4-th row from the top and 5-th column from the left is white. Thus, white should be printed.

见题面 Input 部分

见题面 Output 部分