(0 20 4)(1 8 2 17 3)(5 21 19 16 6)(7 11 9)(10 14 12)(13 18 15)
ALLOWS (11/8)-SEQUENCE
1: (0 1 4)
(0)(1 20 4 8 2 17 3)(5 21 19 16 6)(7 11 9)(10 14 12)(13 18 15)
2: (2 4 8)
(0)(1 20 4 17 3)(2)(5 21 19 16 6)(7 11 9)(8)(10 14 12)(13 18 15)
3: (4 17 20)
(0)(1 20 3)(2)(4)(5 21 19 16 6)(7 11 9)(8)(10 14 12)(13 18 15)(17)
4: (16 21 19)
(0)(1 20 3)(2)(4)(5 21 6)(7 11 9)(8)(10 14 12)(13 18 15)(16)(17)(19)