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

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

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

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

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