Contest Duration: - (local time) (100 minutes) Back to Home
B - Nice Grid /

Time Limit: 2 sec / Memory Limit: 1024 MB

### 制約

• 1 \leq R, C \leq 15
• R, C は整数

### 入力

R C


### 入力例 1

3 5


### 出力例 1

black


### 入力例 2

4 5


### 出力例 2

white


Score : 200 points

### 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.