1: (0 3 7)

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

2: (1 20 6)

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

3: (5 7 12)

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

4: (2 19 4)

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