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

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

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

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

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