Incidence matrix according to Dynkin symbol

o3o3o3o3o3x3x3/2*e

. . . . . . .      | 56 |   6   6 |  15  15  6 |  20  20 15 |  15  15 20 |  6  6 15 | 1 1 6
-------------------+----+---------+------------+------------+------------+----------+------
. . . . . x .      |  2 | 168   * |   5   0  1 |  10   0  5 |  10   0 10 |  5  0 10 | 1 0 5
. . . . . . x      |  2 |   * 168 |   0   5  1 |   0  10  5 |   0  10 10 |  0  5 10 | 0 1 5
-------------------+----+---------+------------+------------+------------+----------+------
. . . . o3x .      |  3 |   3   0 | 280   *  * |   4   0  1 |   6   0  4 |  4  0  6 | 1 0 4
. . . . o . x3/2*e |  3 |   0   3 |   * 280  * |   0   4  1 |   0   6  4 |  0  4  6 | 0 1 4
. . . . . x3x      |  6 |   3   3 |   *   * 56 |   0   0  5 |   0   0 10 |  0  0 10 | 0 0 5
-------------------+----+---------+------------+------------+------------+----------+------
. . . o3o3x .      ♦  4 |   6   0 |   4   0  0 | 280   *  * |   3   0  1 |  3  0  3 | 1 0 3
. . . o3o . x3/2*e ♦  4 |   0   6 |   0   4  0 |   * 280  * |   0   3  1 |  0  3  3 | 0 1 3
. . . . o3x3x3/2*e ♦ 12 |  12  12 |   4   4  4 |   *   * 70 |   0   0  4 |  0  0  6 | 0 0 4
-------------------+----+---------+------------+------------+------------+----------+------
. . o3o3o3x .      ♦  5 |  10   0 |  10   0  0 |   5   0  0 | 168   *  * |  2  0  1 | 1 0 2
. . o3o3o . x3/2*e ♦  5 |   0  10 |   0  10  0 |   0   5  0 |   * 168  * |  0  2  1 | 0 1 2
. . . o3o3x3x3/2*e ♦ 20 |  30  30 |  20  20 10 |   5   5  5 |   *   * 56 |  0  0  3 | 0 0 3
-------------------+----+---------+------------+------------+------------+----------+------
. o3o3o3o3x .      ♦  6 |  15   0 |  20   0  0 |  15   0  0 |   6   0  0 | 56  *  * | 1 0 1
. o3o3o3o . x3/2*e ♦  6 |   0  15 |   0  20  0 |   0  15  0 |   0   6  0 |  * 56  * | 0 1 1
. . o3o3o3x3x3/2*e ♦ 30 |  60  60 |  60  60 20 |  30  30 15 |   6   6  6 |  *  * 28 | 0 0 2
-------------------+----+---------+------------+------------+------------+----------+------
o3o3o3o3o3x .      ♦  7 |  21   0 |  35   0  0 |  35   0  0 |  21   0  0 |  7  0  0 | 8 * *
o3o3o3o3o . x3/2*e ♦  7 |   0  21 |   0  35  0 |   0  35  0 |   0  21  0 |  0  7  0 | * 8 *
. o3o3o3o3x3x3/2*e ♦ 42 | 105 105 | 140 140 35 | 105 105 35 |  42  42 21 |  7  7  7 | * * 8