a-a a-b aaa aab aan aao aas aau aav aax ab- aba abb abn abo abs abu abv abx an- ana anb ann ano ans anu anv anx aoa aob aon aoo aos aou aov aox as- asa asb asn aso ass asu asv asx au- aua aub aun auo aus auv aux av- ava avb avn avo avs avu avx ax- axa axn axo axs axv axx b-u baa bab ban bao bas bau bav bax bba bbb bbn bbo bbs bbu bbx bna bnb bnn bno bns bnu bnv bnx boa bob bon boo bos bou bov box bsa bsb bsn bso bss bsu bsv bsx bua bub bun buo bus buu bux bva bvb bvn bvo bvs bvu bvv bxb bxn bxo bxx naa nab nan nao nas nau nav nax nba nbb nbn nbo nbs nbu nbv nbx nna nnb nnn nno nns nnu nnv no- noa nob non noo nos nou nov nox nsa nsb nsn nso nss nsu nsv nsx nua nub nun nuo nus nuu nuv nux nva nvb nvn nvu nvv nxv oaa oab oan oao oas oau oav oax ob- oba obb obn obo obs obu obv obx on- ona onb onn ono ons onu onx oo- ooa oob oon ooo oos oov oox os- osa osb osn oso oss osu osv osx ou- oua oun ouo ous ov- ova ovb ovo ovs ovv ox- oxa oxb oxn oxo oxx saa sab san sao sas sau sav sax sba sbb sbn sbo sbs sbu sbv sbx sna snb snn sno sns snu snv soa sob son soo sos sou sov sox ss- ssa ssb ssn sso sss ssu ssv ssx sua sub sun suo sus suu suv sux sva svb svn svo svs svu svv svx sxn sxs sxu ua- uaa uab uan uao uas uau uav uba ubb ubn ubo ubs ubu ubv ubx un- una unb unn uno uns unu unv unx uoa uob uon uoo uos uox usa usb usn uso uss usu usv usx uua uun uus uuu uva uvb uvo uvs uvu uvv uxb uxo uxu v-a vaa vab van vao vas vau vav vax vba vbo vbs vbv vn- vna vno vns vnu vnv voa vob von voo vos vou vov vox vsa vsb vsn vso vss vsu vsv vus vuv vva vvb vvo vvs vvv vxa vxs vxv xaa xan xas xau xav xbx xna xno xns xnu xoa xon xoo xos xov xox xsa xsb xss xun xus xuv xxo xxv xxx