1: (1 5 15)

(0 20 2)(1 13 11 15 3)(4 19 10 8 6)(5)(7 12 9)(14 21 18 17 16)

2: (4 19 10)

(0 20 2)(1 13 11 15 3)(4 8 6)(5)(7 12 9)(10)(14 21 18 17 16)(19)

3: (14 21 18)

(0 20 2)(1 13 11 15 3)(4 8 6)(5)(7 12 9)(10)(14 17 16)(18)(19)(21)

4: (3 11 15)

(0 20 2)(1 13 11)(3)(4 8 6)(5)(7 12 9)(10)(14 17 16)(15)(18)(19)(21)