-ic a-a a-b a-c a-i aaa aab aac aai aam aar aau aax ab- aba abb abc abi abm abr abu abx ac- aca acb acc aci acm acr acu acx ai- aia aib aic aii aim air aiu aix ama amb amc ami amm amr amu amx ar- ara arb arc ari arm arr aru arx au- aua aub auc aui aum aur aux ax- axa axi axm axr axx b-u baa bab bac bai bam bar bau bax bba bbb bbc bbi bbm bbr bbu bbx bca bcb bcc bci bcm bcr bcu bcx bi- bia bib bic bii bim bir biu bix bma bmb bmc bmi bmm bmr bmu bmx bra brb bri brm brr bru brx bua bub buc bui bum bur buu bux bxb bxi bxm bxx c-- caa cab cac cai cam car cau cax cba cbb cbc cbi cbm cbr cbu cbx cca ccb ccc cci ccm ccr ccu ccx ci- cia cib cic cii cim cir ciu cix cma cmb cmc cmi cmm cmr cmu cmx cra crb crc cri crm crr cru crx cua cub cuc cui cum cur cuu cxc cxi cxr cxx ia- iaa iab iac iai iam iar iau iba ibb ibc ibi ibm ibr ibu ibx ica icb icc ici icm icr icu iia iib iic iii iim iir iiu iix im- ima imb imc imi imm imu imx ir- ira irb irc iri irm irr iru irx iu- iua iub iuc iui ium iur ixc ixi m-r maa mab mac mai mam mar mau max mba mbb mbc mbi mbm mbr mbu mbx mc- mca mcb mcc mci mcm mcr mcu mcx mi- mia mib mic mii mim mir miu mix mma mmb mmc mmi mmm mmr mmu mmx mra mrb mrc mri mrm mrr mru mrx mua mub muc mui mum mur muu mux mxa mxc mxi mxr mxu ra- raa rab rac rai ram rar rau rax rba rbb rbc rbi rbm rbr rbu rbx rca rcb rcc rci rcm rcr rcu rcx ria rib ric rii rim rir rix rma rmb rmc rmi rmm rmr rmx rra rrb rrc rri rrm rrr rru rua rub ruc rui rum rur ruu rux rxr ua- uaa uab uac uai uam uar uau uba ubb ubc ubi ubr ubu ubx uca ucb ucc uci ucm ucr ucu uia uib uic uii uim uir uiu um- uma umb umc umi umm umr umu ur- ura urb urc uri urm urr uru urx uua uuc uum uur uuu uxb uxc uxr uxu xaa xac xam xar xau xbc xbr xbx xcb xci xcr xcx xia xic xii xiu xix xma xmc xmi xmm xmr xmu xmx xrc xrx xui xxi xxx