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

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

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

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

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