a-a a-b a-c aaa aab aac aao aax ab- aba abb abc abo abx ac- aca acb acc aco acx aoa aob aoc aoo aox ax- axa axo axx baa bab bac bao bax bba bbb bbc bbo bbx bca bcb bcc bco bcx boa bob boc boo box bxb bxo bxx c-- caa cab cac cao cax cba cbb cbc cbo cbx cca ccb ccc cco ccx co- coa cob coc coo cox cxc cxo cxx oaa oab oac oao oax ob- oba obb obc obo obx oc- oca ocb occ oco ocx oo- ooa oob ooc ooo oox ox- oxa oxb oxc oxo oxx xaa xac xbc xbx xcb xcx xoa xoc xoo xox xxo xxx

aaaa aaab aaac aaba aabb aabc aaca aacb aacc aaco aaoo abaa abab abac abax abb- abba abbb abbo abca abcb abcc aboa abob aboo abox acaa acab acac acba acca accc acco acoa aoba aoca axo- axoa axxo ba-x baaa baba babb babo bac- baca bacc baco bbbb bbox bcaa bcbc bcca bccc boab boac boba bobb bobo boca boco boob booc boox boxa c-bo caaa caab caac caba cabo cac- caca cacc caco caxa cbac cbax cbbc cbca cbcc cbox cbxa ccaa ccab ccac ccba ccbc ccca cccb cccc ccob ccoc coax coba cobb cobo coca coco coob coxa cxxx obba obbo obox ocab ocac ocbc occa occc ooaa ooba oooo oxa- oxo- oxox oxxo xbox xobc xoca xoco xoxo xxxo xxxx

-aaa- a-box aaaoc aabaa aabba aacbc abaab ababa abaca abaco abbac abccc aboab abobo acaca acacb babax baboo bacab bacao bacax bacca bacco bo-bo boaco bobac boboc bocac bocao bocca bocoa booba booco c-a-c ca-ca caaba cabob caboc cacao caco- cacoa caoba ccccc co-bo co-co cocao cocc- cocco cocoa cooba obaba ooooo x-box xoxox

aaaaba abacab baabaa babaco bacaba baobab bbbbbb boabab boccob bococa booboo caccao caxaca cobbob cocco- cococo coocoo coxcox oaxaca oooooo xoxoxo

bac-cab bbbbbbb boo-boo o-o-a-a obox-ob oxoboxo xxxxxxx

bbbbbbbb bo-bo-bo xoxoxoxo

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