729 3 2187
6 2 8 | | | | | |
6 2 8 | | | | | | | | | | | |
6 2 8 | / / /| |/ / / |2 | / / /| |/ / / |3 | / / /| |/ / / |4
6 2 8 |1/0/1/| |/2/4/6|2 |1/0/2/| |/8/6/4|3 |2/0/3/| |/4/8/2|4