-ic a-a a-b a-c a-i aaa aab aac aad aai aao aas aau ab- aba abb abc abd abi abo abs abu ac- aca acb acc acd aci aco acs acu ad- ada adb adc add adi ado ads adu ai- aia aib aic aid aii aio ais aiu aoa aob aoc aod aoi aoo aos aou as- asa asb asc asd asi aso ass asu au- aua aub auc aud aui auo aus b-u baa bab bac bad bai bao bas bau bba bbb bbc bbd bbi bbo bbs bbu bca bcb bcc bcd bci bco bcs bcu bda bdb bdc bdd bdi bdo bds bdu bi- bia bib bic bid bii bio bis biu boa bob boc bod boi boo bos bou bsa bsb bsc bsd bsi bso bss bsu bua bub buc bud bui buo bus buu c-- caa cab cac cad cai cao cas cau cba cbb cbc cbd cbi cbo cbs cbu cca ccb ccc ccd cci cco ccs ccu cda cdb cdc cdd cdi cdo cds cdu ci- cia cib cic cid cii cio cis ciu co- coa cob coc cod coi coo cos cou csa csb csc csd csi cso css csu cua cub cuc cud cui cuo cus cuu daa dab dac dad dai dao das dau dba dbb dbc dbd dbi dbo dbs dbu dca dcb dcc dcd dci dco dcs dcu dda ddb ddc ddd ddi ddo dds ddu di- dia dib dic did dii dio dis diu doa dob doc dod doi doo dos dou dsa dsb dsc dsd dsi dso dss dsu dua dub duc dud dui duo dus i-d ia- iaa iab iac iad iai iao ias iau iba ibb ibc ibd ibi ibo ibs ibu ica icb icc icd ici ico ics icu ida idb idc idd idi ido ids idu iia iib iic iid iii iio iis iiu io- ioa iob ioc iod ioi ioo ios iou is- isa isb isc isd isi iso iss isu iu- iua iub iuc iud iui ius o-i oaa oab oac oad oai oao oas oau ob- oba obb obc obd obi obo obs obu oc- oca ocb occ ocd oci oco ocs ocu oda odb odc odd odi odo ods odu oia oib oic oid oii oio ois oiu oo- ooa oob ooc ood ooi ooo oos os- osa osb osc osd osi oso oss osu ou- oua ouc oud oui ouo ous saa sab sac sad sai sao sas sau sba sbb sbc sbd sbi sbo sbs sbu sca scb scc scd sci sco scs scu sda sdb sdc sdd sdi sdo sds sdu sia sib sic sid sii sio sis siu soa sob soc sod soi soo sos sou ss- ssa ssb ssc ssd ssi sso sss ssu sua sub suc sud sui suo sus suu ua- uaa uab uac uad uai uao uas uau uba ubb ubc ubi ubo ubs ubu uca ucb ucc ucd uci uco ucs ucu uda udb udc udd udi udo uds udu uia uib uic uid uii uio uis uiu uoa uob uoc uod uoo uos usa usb usc usd usi uso uss usu uua uuc uus uuu