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

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

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

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

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