1: (0 7 11)

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

2: (1 20 9)

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

3: (6 14 8)

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

4: (5 19 11)

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