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.

Constraints

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

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.

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.