-ic a-a a-b a-c a-i aaa aab aac aai aan aao aas aau ab- aba abb abc abi abn abo abs abu ac- aca acb acc aci acn aco acs acu ai- aia aib aic aii ain aio ais aiu an- ana anb anc ani ann ano ans anu aoa aob aoc aoi aon aoo aos aou as- asa asb asc asi asn aso ass asu au- aua aub auc aui aun auo aus b-u baa bab bac bai ban bao bas bau bba bbb bbc bbi bbn bbo bbs bbu bca bcb bcc bci bcn bco bcs bcu bi- bia bib bic bii bin bio bis biu bna bnb bnc bni bnn bno bns bnu boa bob boc boi bon boo bos bou bsa bsb bsc bsi bsn bso bss bsu bua bub buc bui bun buo bus buu c-- caa cab cac cai can cao cas cau cba cbb cbc cbi cbn cbo cbs cbu cca ccb ccc cci ccn cco ccs ccu ci- cia cib cic cii cin cio cis ciu cn- cna cnb cnc cni cnn cno cns cnu co- coa cob coc coi con coo cos cou csa csb csc csi csn cso css csu cua cub cuc cui cun cuo cus cuu ia- iaa iab iac iai ian iao ias iau iba ibb ibc ibi ibn ibo ibs ibu ica icb icc ici icn ico ics icu iia iib iic iii iin iio iis iiu in- ina inb inc ini inn ino ins inu io- ioa iob ioc ioi ion ioo ios iou is- isa isb isc isi isn iso iss isu iu- iua iub iuc iui ius n-i naa nab nac nai nan nao nas nau nba nbb nbc nbi nbn nbo nbs nbu nca ncb ncc nci ncn nco ncs ncu nia nib nic nii nin nio nis niu nna nnb nnc nni nnn nno nns nnu no- noa nob noc noi non noo nos nou nsa nsb nsc nsi nsn nso nss nsu nua nub nuc nui nun nuo nus nuu o-i oaa oab oac oai oan oao oas oau ob- oba obb obc obi obn obo obs obu oc- oca ocb occ oci ocn oco ocs ocu oia oib oic oii oin oio ois oiu on- ona onb onc oni onn ono ons onu oo- ooa oob ooc ooi oon ooo oos os- osa osb osc osi osn oso oss osu ou- oua ouc oui oun ouo ous saa sab sac sai san sao sas sau sba sbb sbc sbi sbn sbo sbs sbu sca scb scc sci scn sco scs scu sia sib sic sii sin sio sis siu sna snb snc sni snn sno sns snu soa sob soc soi son soo sos sou ss- ssa ssb ssc ssi ssn sso sss ssu sua sub suc sui sun suo sus suu ua- uaa uab uac uai uan uao uas uau uba ubb ubc ubi ubn ubo ubs ubu uca ucb ucc uci ucn uco ucs ucu uia uib uic uii uin uio uis uiu un- una unb unc uni unn uno uns unu uoa uob uoc uon uoo uos usa usb usc usi usn uso uss usu uua uuc uun uus uuu