-er -ic a-a a-b a-c a-i aaa aab aac aae aah aai aar aau ab- aba abb abc abe abh abi abr abu ac- aca acb acc ace ach aci acr acu aea aeb aec aee aeh aei aer aeu aha ahb ahc ahe ahh ahi ahr ahu ai- aia aib aic aie aih aii air aiu ar- ara arb arc are arh ari arr aru au- aua aub auc aue auh aui aur b-u baa bab bac bae bah bai bar bau bba bbb bbc bbe bbh bbi bbr bbu bca bcb bcc bce bch bci bcr bcu be- bea beb bec bee beh bei ber beu bha bhb bhc bhe bhh bhi bhr bhu bi- bia bib bic bie bih bii bir biu bra brb bre brh bri brr bru bua bub buc bue buh bui bur buu c-- caa cab cac cae cah cai car cau cba cbb cbc cbe cbh cbi cbr cbu cca ccb ccc cce cch cci ccr ccu ce- cea ceb cec cee ceh cei cer ceu ch- cha chb chc che chh chi chr chu ci- cia cib cic cie cih cii cir ciu cra crb crc cre crh cri crr cru cua cub cuc cue cuh cui cur cuu eaa eab eac eae eah eai ear eau eba ebb ebc ebe ebh ebi ebr ebu ec- eca ecb ecc ece ech eci ecr ecu eea eeb eec eee eer eha ehb ehc ehe ehh ehi ehr ehu eia eib eic eie eii eir eiu era erb erc ere erh eri err eru eu- eua eub euc eue eui eur h-i haa hab hac hae hah hai har hau hba hbb hbc hbe hbh hbi hbr hbu hca hcb hcc hce hch hci hcr he- hea heb hec hee heh hei her heu hha hhb hhc hhe hhh hhi hhr hhu hia hib hic hie hih hii hir hiu hr- hra hrb hrc hre hrh hri hrr hru hua hub huc hue huh hui hur huu ia- iaa iab iac iae iah iai iar iau iba ibb ibc ibe ibh ibi ibr ibu ica icb icc ice ich ici icr icu ie- iea iec iee iei ier iha ihb ihc ihe ihh ihi ihr ihu iia iib iic iie iih iii iir iiu ir- ira irb irc ire iri irr iru iu- iua iub iuc iue iui iur ra- raa rab rac rae rah rai rar rau rba rbb rbc rbe rbh rbi rbr rbu rca rcb rcc rce rch rci rcr rcu re- rea reb rec ree reh rei rer reu rh- rha rhb rhc rhe rhh rhi rhr rhu ria rib ric rie rih rii rir rra rrb rrc rrh rri rrr rru rua rub ruc rue ruh rui rur ruu ua- uaa uab uac uae uah uai uar uau uba ubb ubc ube ubh ubi ubr ubu uca ucb ucc uce uch uci ucr ucu uea ueb uec uee ueh uei uer uha uhb uhc uhe uhh uhi uhr uhu uia uib uic uie uii uir uiu ur- ura urb urc ure uri urr uru uua uuc uue uur uuu