1: (0 3 7)

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

2: (6 7 8)

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

3: (1 19 4)

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

4: (3 12 7)

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