a-do aaaa aaab aaad aaba aabb aabd aada aaoo abaa abab abad abag abb- abba abbb abbo abda abdo abgd aboa abob abod aboo adaa adab adad adag adao adba adda addd addo adob adod adog adoo ag-o agad agag agao agba agbo agda agga agob agod agog agoo aoba baaa baad baba babb babo bada badb badd bado baga bagg bago bbad bbbb bbdd bbdo bbga bdog boab boad boag boba bobb bobo boda bodb bodo boga bogd bogg bogo boob bood boog d-bo daab daad daag daba dabb dabo dada dado daga dagg dago dbag dddd doab doba dobb dod- doda dodd dodg dodo dog- doga dogg dogo doob dood gaba gabb gabo gada gadd gado gaga gagg gago gbag gbbo gddb gggg goad goba gobo goda godo goga gogo good goog obad obba obbo odbo odda oddd odoo ogb ogba ogoa ogod ogog ooaa ooba ooda oooo