-ic a-a a-b a-c a-i a-t aaa aab aac aad aai aas aat aau ab- aba abb abc abd abi abs abt abu ac- aca acb acc acd aci acs act acu ad- ada adb adc add adi ads adt adu ai- aia aib aic aid aii ais ait aiu as- asa asb asc asd asi ass ast asu at- ata atb atc atd ati ats att atu au- aua aub auc aud aui aus aut b-u baa bab bac bad bai bas bat bau bba bbb bbc bbd bbi bbs bbt bbu bca bcb bcc bcd bci bcs bct bcu bda bdb bdc bdd bdi bds bdt bdu bi- bia bib bic bid bii bis bit biu bsa bsb bsc bsd bsi bss bst bsu bta btb btc btd bti bts btt btu bua bub buc bud bui bus but buu c-- caa cab cac cad cai cas cat cau cba cbb cbc cbd cbi cbs cbt cbu cca ccb ccc ccd cci ccs cct ccu cda cdb cdc cdd cdi cds cdt cdu ci- cia cib cic cid cii cis cit ciu csa csb csc csd csi css cst csu cta ctb ctc ctd cti cts ctt ctu cua cub cuc cud cui cus cut cuu daa dab dac dad dai das dat dau dba dbb dbc dbd dbi dbs dbt dbu dca dcb dcc dcd dci dcs dct dcu dda ddb ddc ddd ddi dds ddt ddu di- dia dib dic did dii dis dit diu dsa dsb dsc dsd dsi dss dst dsu dta dtb dtc dtd dti dts dtt dtu dua dub duc dud dui dus dut i-d ia- iaa iab iac iad iai ias iat iau iba ibb ibc ibd ibi ibs ibt ibu ica icb icc icd ici ics ict icu ida idb idc idd idi ids idt idu iia iib iic iid iii iis iit iiu is- isa isb isc isd isi iss ist isu ita itb itc itd iti its itt itu iu- iua iub iuc iud iui ius iut saa sab sac sad sai sas sat sau sba sbb sbc sbd sbi sbs sbt sbu sca scb scc scd sci scs sct scu sda sdb sdc sdd sdi sds sdt sdu sia sib sic sid sii sis sit siu ss- ssa ssb ssc ssd ssi sss sst ssu sta stb stc std sti sts stt stu sua sub suc sud sui sus sut suu taa tab tac tad tai tas tat tau tba tbb tbc tbd tbi tbs tbt tbu tca tcb tcc tcd tci tcs tct tcu tda tdb tdc tdd tdi tds tdt tdu tia tib tic tid tii tis tit tiu tsa tsb tsc tsd tsi tss tst tsu tta ttb ttc ttd tti tts ttt ttu tua tub tuc tud tui tus tut tuu ua- uaa uab uac uad uai uas uat uau uba ubb ubc ubi ubs ubt ubu uca ucb ucc ucd uci ucs uct ucu uda udb udc udd udi uds udt udu uia uib uic uid uii uis uit uiu usa usb usc usd usi uss ust usu uta utb utc utd uti uts utt utu uua uuc uus uut uuu