-ic a-a a-b a-c a-i aaa aab aac aah aai aao aar aau aax ab- aba abb abc abh abi abo abr abu abx ac- aca acb acc ach aci aco acr acu acx aha ahb ahc ahh ahi aho ahr ahu ahx ai- aia aib aic aih aii aio air aiu aix aoa aob aoc aoh aoi aoo aor aou aox ar- ara arb arc arh ari aro arr aru arx au- aua aub auc auh aui auo aur aux ax- axa axh axi axo axr axx b-u baa bab bac bah bai bao bar bau bax bba bbb bbc bbh bbi bbo bbr bbu bbx bca bcb bcc bch bci bco bcr bcu bcx bha bhb bhc bhh bhi bho bhr bhu bhx bi- bia bib bic bih bii bio bir biu bix boa bob boc boh boi boo bor bou box bra brb brh bri bro brr bru brx bua bub buc buh bui buo bur buu bux bxb bxi bxo bxx c-- caa cab cac cah cai cao car cau cax cba cbb cbc cbh cbi cbo cbr cbu cbx cca ccb ccc cch cci cco ccr ccu ccx ch- cha chb chc chh chi cho chr chu chx ci- cia cib cic cih cii cio cir ciu cix co- coa cob coc coh coi coo cor cou cox cra crb crc crh cri cro crr cru crx cua cub cuc cuh cui cuo cur cuu cxc cxh cxi cxo cxr cxx h-i haa hab hac hah hai hao har hau hax hba hbb hbc hbh hbi hbo hbr hbu hbx hca hcb hcc hch hci hco hcr hha hhb hhc hhh hhi hho hhr hhu hia hib hic hih hii hio hir hiu hix hoa hob hoc hoh hoi hoo hor hou hox hr- hra hrb hrc hrh hri hro hrr hru hua hub huc huh hui huo hur huu hux hxc ia- iaa iab iac iah iai iao iar iau iba ibb ibc ibh ibi ibo ibr ibu ibx ica icb icc ich ici ico icr icu iha ihb ihc ihh ihi iho ihr ihu iia iib iic iih iii iio iir iiu iix io- ioa iob ioc ioh ioi ioo ior iou ir- ira irb irc iri iro irr iru irx iu- iua iub iuc iui iur ixc ixi o-i oaa oab oac oah oai oao oar oau oax ob- oba obb obc obh obi obo obr obu obx oc- oca ocb occ och oci oco ocr ocu ocx oha ohc ohh ohi oho ohr ohu oia oib oic oii oio oir oiu oo- ooa oob ooc ooh ooi ooo oor oox or- ora orb orc orh ori oro orr oru orx ou- oua ouc ouh oui ouo our ox- oxa oxb oxc oxi oxo oxx ra- raa rab rac rah rai rao rar rau rax rba rbb rbc rbh rbi rbo rbr rbu rbx rca rcb rcc rch rci rco rcr rcu rcx rh- rha rhb rhc rhh rhi rho rhr rhu ria rib ric rih rii rio rir rix roa rob roc roh roi roo ror rou rox rra rrb rrc rrh rri rrr rru rua rub ruc ruh rui ruo rur ruu rux rxr ua- uaa uab uac uah uai uao uar uau uba ubb ubc ubh ubi ubo ubr ubu ubx uca ucb ucc uch uci uco ucr ucu uha uhb uhc uhh uhi uho uhr uhu uia uib uic uii uio uir uiu uoa uob uoc uoo uor uox ur- ura urb urc uri uro urr uru urx uua uuc uur uuu uxb uxc uxo uxr uxu xaa xac xar xau xbc xbr xbx xcb xch xci xcr xcx xia xic xii xio xiu xix xoa xoc xoi xoo xor xox xrc xrx xui xxi xxo xxx