1 | initial version |

I suppose you can try this:

```
D = CyclicPermutationGroup(9)
H = D.subgroups()
for i in H:
for j in H:
K = set(D(x*y) for x in i for y in j)
if K == set(G):
...
```

2 | No.2 Revision |

I suppose you can try this:

```
D = CyclicPermutationGroup(9)
H = D.subgroups()
for i in H:
for j in H:
K = set(D(x*y) for x in i for y in j)
if K ==
```~~set(G):
~~set(D):
...

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