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

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

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

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

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