A . C-12->VC-12->TU-12->TUG-2->VC-3->AU-4->AUGB . C-12->VC-12->TU-12->VC2->TUG-2->TUG-3->AU-4->AUGC . C-12->VC-12->TU-12->TUG-2->TUG-3->VC-4->AU-4->AUGD . C-12->VC-12-->TU-12->TUG-2->VC-3->TUG-3->AU-4->AUG
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