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

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

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

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

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