Nine-stones game is an old game played on a board similar to the one on the right. The purpose of the game is to put 3 same color stones in a row, (on the same continuous line) so that you can remove one piece from your opponent. Number positions and adjacency list is given in the second image. For example in the third image, the green stones are aligned on a straight-line while orange and black pieces are not.

Input specification
Firstly, you are going to be given a number (n) the number of pieces to be placed on the board where 0 ≤ n ≤ 16. Then in the following n lines, you are going to be given the coordinates and colors (black or white) of n pieces.

Output specification
Show color of the first group which aligns on a line the first. Show the message "No", if no group aligns the pieces on a line.