1: (0 6 13)

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

2: (1 20 8)

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

3: (4 9 7)

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

4: (6 19 11)

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