1: (0 5 11)

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

2: (1 20 9)

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

3: (4 15 6)

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

4: (3 19 11)

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