a-a a-b a-c aaa aab aac aaj aak aao aau aav ab- aba abb abc abj abk abo abu abv ac- aca acb acc acj ack aco acu acv aja ajb ajc ajj ajk ajo aju aka akb akc akj akk ako aku akv aoa aob aoc aoj aok aoo aou aov au- aua aub auc auj auk auo auv av- ava avb avc avk avo avu b-u baa bab bac baj bak bao bau bav bba bbb bbc bbk bbo bbu bca bcb bcc bcj bck bco bcu bcv bja bjc bjj bjk bju bka bkb bkc bkk bko bkv boa bob boc boj bok boo bou bov bua bub buc buj buk buo buu bva bvb bvc bvk bvo bvu bvv c-- c-j caa cab cac caj cak cao cau cav cba cbb cbc cbj cbk cbo cbu cbv cca ccb ccc ccj cck cco ccu ccv cja cjb cjc cjk cka ckb ckc cko co- coa cob coc coj cok coo cou cov cua cub cuc cuk cuo cuu cuv cva cvb cvc cvk cvo cvu cvv jaa jab jac jaj jak jao jau jav jba jbc jbj jbk jbo jbu jca jcb jcc jck jco jcu jja jjb jjc jjj jjk jju jka jkb jkk jko jku jkv joa job joc joj jok joo jou jub juk juo juv jvb jvc ka- kaa kab kac kaj kak kao kau kav kba kbb kbc kbk kbo kbu kca kcb kcc kck kcu kjb kjc kju kkb kkc kkk kku kkv koa kob koc kok koo kou kub kuc kuj kuk kuu kva kvb kvk kvo kvv oaa oab oac oaj oak oao oau oav ob- oba obb obc obj obk obo obu obv oc- oca ocb occ ocj ock oco ocu ocv oja ojb ojc ojo oju oka okb okc okj okk oko oku oo- ooa oob ooc ook ooo oov ou- oua ouc ouk ouo ov- ova ovb ovc ovo ovv ua- uaa uab uac uaj uak uao uau uav uba ubb ubc ubk ubo ubu ubv uca ucb ucc ucj uck uco ucu ucv ujc ujo uka ukb ukc ukk uku uoa uob uoc uoj uok uoo uua uuc uuu uva uvb uvc uvo uvu uvv v-a vaa vab vac vaj vak vao vau vav vba vbc vbk vbo vbv vca vcc vco vcu vja vka vkb voa vob voc vok voo vou vov vuk vuv vva vvb vvc vvo vvv