1: (0 6 11)

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

2: (1 20 7)

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

3: (6 15 8)

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

4: (10 18 12)

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