a-do aaaa aaab aaac aaad aaba aabb aabc aabd aaca aacb aacc aacd aaco aada aadc aaoo abaa abab abac abad abag abb- abba abbb abbo abca abcb abcc abcd abda abdo abgd aboa abob abod aboo acaa acab acac acad acag acba acca accc accd acco acda acdb acdc acga acoa acod acog adaa adab adac adad adag adao adba adbc adcc adda addc addd addo adob adoc adod adog adoo ag-o agac agad agag agao agba agbo agca agcc agco agda agga agob agod agog agoo aoba aoca baaa baad baba babb babo bac- baca bacc baco bada badb badd bado baga bagg bago bbad bbbb bbdd bbdo bbga bcaa bcbc bcbg bcca bccc bcda bdbc bddc bdog bgca boab boac boad boag boba bobb bobo boca boco boda bodb bodo boga bogd bogg bogo boob booc bood boog c-bo c-cd caaa caab caac caba cabg cabo cac- caca cacc caco cada cadc cadd cado caga cagg cago caod cbac cbbc cbca cbcc cbdb cbdc cbdo cbga cbgb ccaa ccab ccac ccad ccag ccba ccbc ccca cccb cccc ccdc ccga ccgc ccob ccoc ccod cdaa cdac cdad cdba cdda cddb cgac cgcc cgcg coad coag coba cobb cobo coca coco coda codd cogo coob cood d-bo daab daad daag daba dabb dabo daca dada dado daga dagg dago dbag dbcc dcbc dcca dccb dccc dcdb dcgo dddd ddoc dgac dgca doab doba dobb doca doco dod- doda dodd dodg dodo dog- doga dogg dogo doob dood gaba gabb gabo gada gadd gado gaga gagg gago gbag gbbo gc-c gcaa gcbc gccc gcda gcoa gdca gddb gggg goad goba gobo goca goda godo goga gogo good goog obad obba obbo ocab ocac ocad ocbc occa occc ocga odac odbo odda oddd odoo ogb ogba ogdc ogoa ogod ogog ooaa ooba ooda oooo