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

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

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

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

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