-ic a-a a-b a-c a-i aaa aab aac aad aai aas aau ab- aba abb abc abd abi abs abu ac- aca acb acc acd aci acs acu ad- ada adb adc add adi ads adu ai- aia aib aic aid aii ais aiu as- asa asb asc asd asi ass asu au- aua aub auc aud aui aus b-u baa bab bac bad bai bas bau bba bbb bbc bbd bbi bbs bbu bca bcb bcc bcd bci bcs bcu bda bdb bdc bdd bdi bds bdu bi- bia bib bic bid bii bis biu bsa bsb bsc bsd bsi bss bsu bua bub buc bud bui bus buu c-- caa cab cac cad cai cas cau cba cbb cbc cbd cbi cbs cbu cca ccb ccc ccd cci ccs ccu cda cdb cdc cdd cdi cds cdu ci- cia cib cic cid cii cis ciu csa csb csc csd csi css csu cua cub cuc cud cui cus cuu daa dab dac dad dai das dau dba dbb dbc dbd dbi dbs dbu dca dcb dcc dcd dci dcs dcu dda ddb ddc ddd ddi dds ddu di- dia dib dic did dii dis diu dsa dsb dsc dsd dsi dss dsu dua dub duc dud dui dus i-d ia- iaa iab iac iad iai ias iau iba ibb ibc ibd ibi ibs ibu ica icb icc icd ici ics icu ida idb idc idd idi ids idu iia iib iic iid iii iis iiu is- isa isb isc isd isi iss isu iu- iua iub iuc iud iui ius saa sab sac sad sai sas sau sba sbb sbc sbd sbi sbs sbu sca scb scc scd sci scs scu sda sdb sdc sdd sdi sds sdu sia sib sic sid sii sis siu ss- ssa ssb ssc ssd ssi sss ssu sua sub suc sud sui sus suu ua- uaa uab uac uad uai uas uau uba ubb ubc ubi ubs ubu uca ucb ucc ucd uci ucs ucu uda udb udc udd udi uds udu uia uib uic uid uii uis uiu usa usb usc usd usi uss usu uua uuc uus uuu