-ic a-a a-b a-c a-i aaa aab aac aai aan aao aau aay ab- aba abb abc abi abn abo abu aby ac- aca acb acc aci acn aco acu acy ai- aia aib aic aii ain aio aiu aiy an- ana anb anc ani ann ano anu any aoa aob aoc aoi aon aoo aou au- aua aub auc aui aun auo ay- aya ayc ayi ayn ayo ayu b-u baa bab bac bai ban bao bau bay bba bbb bbc bbi bbn bbo bbu bby bca bcb bcc bci bcn bco bcu bcy bi- bia bib bic bii bin bio biu biy bna bnb bnc bni bnn bno bnu boa bob boc boi bon boo bou boy bua bub buc bui bun buo buu buy by- bya byc byi byn byo byu c-- caa cab cac cai can cao cau cay cba cbb cbc cbi cbn cbo cbu cby cca ccb ccc cci ccn cco ccu ci- cia cib cic cii cin cio ciu cn- cna cnb cnc cni cnn cno cnu cny co- coa cob coc coi con coo cou coy cua cub cuc cui cun cuo cuu cuy cya cyb cyc cyn cyo ia- iaa iab iac iai ian iao iau iba ibb ibc ibi ibn ibo ibu iby ica icb icc ici icn ico icu icy iia iib iic iii iin iio iiu in- ina inb inc ini inn ino inu iny io- ioa iob ioc ioi ion ioo iou iu- iua iub iuc iui iya iyc iyo iyy n-i naa nab nac nai nan nao nau nay nba nbb nbc nbi nbn nbo nbu nca ncb ncc nci ncn nco ncu nia nib nic nii nin nio niu nna nnb nnc nni nnn nno nnu no- noa nob noc noi non noo nou noy nua nub nuc nui nun nuo nuu nuy nya nyc nyn nyo nyu nyy o-i oaa oab oac oai oan oao oau ob- oba obb obc obi obn obo obu oby oc- oca ocb occ oci ocn oco ocu oia oib oic oii oin oio oiu on- ona onb onc oni onn ono onu ony oo- ooa oob ooc ooi oon ooo ou- oua ouc oui oun ouo oya oyi oyo ua- uaa uab uac uai uan uao uau uay uba ubb ubc ubi ubn ubo ubu uby uca ucb ucc uci ucn uco ucu uia uib uic uii uin uio uiu un- una unb unc uni unn uno unu uny uoa uob uoc uon uoo uua uuc uun uuu uyc uyi uyo uyu yaa yab yac yai yan yao yau yay ybc ybi yby yca ycc yci yco ycu ycy yii yin yio yna ynn ynu yny yob yoc yoi yon yoo you yoy yua yui yun yuo yuu yuy yyb yyc yyu yyy