-ic a-a a-b a-c a-i aaa aab aac aaf aah aai aao aau ab- aba abb abc abf abh abi abo abu ac- aca acb acc acf ach aci aco acu af- afa afb afc aff afh afi afo afu aha ahb ahc ahf ahh ahi aho ahu ai- aia aib aic aif aih aii aio aiu aoa aob aoc aof aoh aoi aoo aou au- aua aub auc auf auh aui auo b-u baa bab bac baf bah bai bao bau bba bbb bbc bbf bbh bbi bbo bbu bca bcb bcc bcf bch bci bco bcu bfa bfb bfc bff bfh bfi bfo bfu bha bhb bhc bhf bhh bhi bho bhu bi- bia bib bic bif bih bii bio biu boa bob boc bof boh boi boo bou bua bub buc buf buh bui buo buu c-- caa cab cac caf cah cai cao cau cba cbb cbc cbf cbh cbi cbo cbu cca ccb ccc ccf cch cci cco ccu cfa cfb cfc cff cfh cfi cfo cfu ch- cha chb chc chf chh chi cho chu ci- cia cib cic cif cih cii cio ciu co- coa cob coc cof coh coi coo cou cua cub cuc cuf cuh cui cuo cuu faa fab fac faf fah fai fao fau fba fbb fbc fbf fbh fbi fbo fbu fca fcb fcc fcf fci fco fcu ffa ffc fff ffh ffi ffo ffu fha fhb fhc fhf fhh fhi fho fia fib fic fif fih fii fiu foa fob foc fof foh foi foo fou fua fub fuf fui fuo fuu h-i haa hab hac haf hah hai hao hau hba hbb hbc hbf hbh hbi hbo hbu hca hcb hcc hcf hch hci hco hfa hfb hfc hff hfh hfi hfo hfu hha hhb hhc hhf hhh hhi hho hhu hia hib hic hif hih hii hio hiu hoa hob hoc hof hoh hoi hoo hou hua hub huc huf huh hui huo huu i-f ia- iaa iab iac iaf iah iai iao iau iba ibb ibc ibf ibh ibi ibo ibu ica icb icc icf ich ici ico icu ifa ifb ifc iff ifi ifo ifu iha ihb ihc ihf ihh ihi iho ihu iia iib iic iif iih iii iio iiu io- ioa iob ioc iof ioh ioi ioo iou iu- iua iub iuc iui o-i oaa oab oac oaf oah oai oao oau ob- oba obb obc obf obh obi obo obu oc- oca ocb occ ocf och oci oco ocu of- ofa ofb ofc off ofi ofo ofu oha ohc ohf ohh ohi oho ohu oia oib oic oif oii oio oiu oo- ooa oob ooc oof ooh ooi ooo ou- oua ouc ouf ouh oui ouo ua- uaa uab uac uaf uah uai uao uau uba ubb ubc ubf ubh ubi ubo ubu uca ucb ucc ucf uch uci uco ucu ufa ufc uff ufh ufi ufo ufu uha uhb uhc uhf uhh uhi uho uhu uia uib uic uif uii uio uiu uoa uob uoc uoo uua uuc uuu