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

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

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

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

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