1: (0 6 11)

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

2: (1 20 7)

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

3: (6 13 8)

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

4: (9 15 12)

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