Incidence matrix according to Dynkin symbol

o3o3o3x5o   (N → ∞)

. . . . . | 300N ♦     8 |    12    4 |    8   6 |    2 4
----------+------+-------+------------+----------+-------
. . . x . |    2 | 1200N |     3    1 |    3   3 |    1 3
----------+------+-------+------------+----------+-------
. . o3x . |    3 |     3 | 1200N    * |    2   1 |    1 2
. . . x5o |    5 |     5 |     * 240N |    0   3 |    0 3
----------+------+-------+------------+----------+-------
. o3o3x . ♦    4 |     6 |     4    0 | 600N   * |    1 1
. . o3x5o ♦   30 |    60 |    20   12 |    * 60N |    0 2
----------+------+-------+------------+----------+-------
o3o3o3x . ♦    5 |    10 |    10    0 |    5   0 | 120N *
. o3o3x5o ♦ 1200 |  3600 |  2400  720 |  600 120 |    * N