Practice Flood fill and Recursion with the exercise "Go competition"

Learning Opportunities

This puzzle can be solved using the following concepts. Practice using these concepts and improve your skills.

Statement

Goal

Go is an abstract strategy board game for two players, in which the aim is to surround more territory than the opponent. At the end of the game, you have to determine which player is the winner by counting which one has the biggest territory.

Area scoring: A player's score is the number of stones that he has on the board, plus the number of empty intersections surrounded by that player's stones.

BLACK is always first so WHITE starts with 6.5 points also known as "komi".

Every board is in a stable position, you only have to calculate the territories.

Example (with only a 4x4 grid):


.BW.
BBWW
.BW.
BBWW

After transformation we have:


bBWw
BBWW
bBWw
BBWW

6B + 2b = 8 for BLACK
6W + 2w + 6.5(komi) = 14.5 for WHITE

WHITE is the winner.

Input

Line 1: An integer L for the number of lines of the go board
Next L lines: Each line is the state of the board, . represents an empty intersection , B a BLACK stone and W a WHITE stone.
Each line contains L characters.

Output

You have to print:

WHITE : score
BLACK : score
BLACK/WHITE WINS

WHITE score always ends with ".5"

Constraints

L is in [ 9 , 13 , 19 ]
L lines contains only [ . , B , W ] characters

Example

Input

9
....BW...
....BW...
....BW...
....BW...
...BBW...
...BWW...
...BW....
...BW....
...BW....

Output

BLACK : 41
WHITE : 46.5
WHITE WINS

Solve it

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