As abstract polytope sirpin is isomorphic to fawdint, thereby replacing octagons by octagrams, resp. tic by quith and socco by gocco, resp. steth by gittith and rawvatoth by wavitoth. – As such sirpin is a lieutenant.

Incidence matrix according to Dynkin symbol

o3x3o3o *b4x4/3*c

. . . .    .      | 320 |   6   3 |   3   6   6   3 |   3  3   2  6  1 |  1  3  2
------------------+-----+---------+-----------------+------------------+---------
. x . .    .      |   2 | 960   * |   1   2   1   0 |   2  1   1  2  0 |  1  2  1
. . . .    x      |   2 |   * 480 |   0   0   2   2 |   0  1   0  4  1 |  0  2  2
------------------+-----+---------+-----------------+------------------+---------
o3x . .    .      |   3 |   3   0 | 320   *   *   * |   2  1   0  0  0 |  1  2  0
. x3o .    .      |   3 |   3   0 |   * 640   *   * |   1  0   1  1  0 |  1  1  1
. x . . *b4x      |   8 |   4   4 |   *   * 240   * |   0  1   0  2  0 |  0  2  1
. . o .    x4/3*c |   4 |   0   4 |   *   *   * 240 |   0  0   0  2  1 |  0  1  2
------------------+-----+---------+-----------------+------------------+---------
o3x3o .    .      ♦   6 |  12   0 |   4   4   0   0 | 160  *   *  *  * |  1  1  0
o3x . . *b4x      ♦  24 |  24  12 |   8   0   6   0 |   * 40   *  *  * |  0  2  0
. x3o3o    .      ♦   4 |   6   0 |   0   4   0   0 |   *  * 160  *  * |  1  0  1
. x3o . *b4x4/3*c ♦  24 |  24  24 |   0   8   6   6 |   *  *   * 80  * |  0  1  1
. . o3o    x4/3*c ♦   8 |   0  12 |   0   0   0   6 |   *  *   *  * 40 |  0  0  2
------------------+-----+---------+-----------------+------------------+---------
o3x3o3o    .      ♦  10 |  30   0 |  10  20   0   0 |   5  0   5  0  0 | 32  *  *
o3x3o . *b4x4/3*c ♦  96 | 192  96 |  64  64  48  24 |  16  8   0  8  0 |  * 10  *
. x3o3o *b4x4/3*c ♦  64 |  96  96 |   0  64  24  48 |   0  0  16  8  8 |  *  * 10