a-a a-b a-c aaa aab aac aae aaj aao aau aav ab- aba abb abc abe abj abo abu abv ac- aca acb acc ace acj aco acu acv aea aeb aec aee aej aeo aeu aev aja ajb ajc aje ajj ajo aju aoa aob aoc aoe aoj aoo aou aov au- aua aub auc aue auj auo auv av- ava avb avc ave avo avu b-u baa bab bac bae baj bao bau bav bba bbb bbc bbe bbo bbu bca bcb bcc bce bcj bco bcu bcv be- bea beb bec bee beo beu bev bja bjc bjj bju boa bob boc boe boj boo bou bov bua bub buc bue buj buo buu bva bvb bvc bve bvo bvu bvv c-- c-j caa cab cac cae caj cao cau cav cba cbb cbc cbe cbj cbo cbu cbv cca ccb ccc cce ccj cco ccu ccv ce- cea ceb cec cee cej ceo ceu cev cja cjb cjc co- coa cob coc coe coj coo cou cov cua cub cuc cue cuo cuu cuv cva cvb cvc cve cvo cvu cvv eaa eab eac eae eaj eao eau eav eba ebb ebc ebe ebj ebo ebu ebv ec- eca ecb ecc ece ecj eco ecu ecv eea eeb eec eee eeo eev eja ejc ejo eju eo- eoa eob eoc eoe eoo eou eu- eua eub euc eue euj euv eva evb evc eve evo evv jaa jab jac jae jaj jao jau jav jba jbc jbj jbo jbu jca jcb jcc jce jco jcu jea jeb jec jee jej jeo jeu jja jjb jjc jjj jju joa job joc joe joj joo jou jub jue juo juv jvb jvc oaa oab oac oae oaj oao oau oav ob- oba obb obc obe obj obo obu obv oc- oca ocb occ ocj oco ocu ocv oea oeb oec oee oeo oja ojb ojc oje ojo oju oo- ooa oob ooc ooo oov ou- oua ouc oue ouo ov- ova ovb ovc ove ovo ovv ua- uaa uab uac uae uaj uao uau uav uba ubb ubc ube ubo ubu ubv uca ucb ucc uce ucj uco ucu ucv uea ueb uec uee ujc ujo uoa uob uoc uoe uoj uoo uua uuc uue uuu uva uvb uvc uve uvo uvu uvv v-a v-e vaa vab vac vae vaj vao vau vav vba vbc vbo vbv vca vcc vce vco vcu vea veb vec vee veo veu vja voa vob voc voe voo vou vov vue vuv vva vvb vvc vvo vvv