1: (6 8 13)

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

2: (4 11 7)

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

3: (6 8 13)

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

4: (9 14 12)

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