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

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

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

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

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