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

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

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

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

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