SP7191 HEXBOARD - Hexagonal Board

Square boards (as the chessboard) are really common among games and luckily, they are easy to draw with the help of a ruler. However, there exist other games that requiere hexagonal boards, that are much harder to draw by hand. The Institute for Client Permanent Comfort (ICPC) of a famous board game factory has decided to provide their customers with an automated program to build hexagonal boards for several games. The size of an hexagonal board is determined by a single integer N that indicates how many cells there are in each of the 6 sides of the board. For example, a board of size N = 2 should look as follows when drawn by the program. \_ \_/ \\\_ / \\\_/ \\ \\\_/ \\\_/ / \\\_/ \\ \\\_/ \\\_/ \\\_/ Your task is to help ICPC in making the program.

The input contains several test cases. Each test case is described in a single line that contains an integer N representing the size of the board (1 contains a single −1 and should not be processed as a test case.

For each test case output the hexagonal board of the required size, and a line with exactly three asterisks. You have to follow the sample input and output, as well as the example given above. Use only regular spaces, underscores (“ ”), slashes (“/”) and backslashes (“\\”). There must be no trailing spaces at the end of printed lines, neither empty lines.