-er -ic a-a a-b a-c a-i aaa aab aac aae aah aai aan aar ab- aba abb abc abe abh abi abn abr ac- aca acb acc ace ach aci acn acr aea aeb aec aee aeh aei aen aer aha ahb ahc ahe ahh ahi ahn ahr ai- aia aib aic aie aih aii ain air an- ana anb anc ane anh ani ann anr ar- ara arb arc are arh ari arn arr baa bab bac bae bah bai ban bar bba bbb bbc bbe bbh bbi bbn bbr bca bcb bcc bce bch bci bcn bcr be- bea beb bec bee beh bei ben ber bha bhb bhc bhe bhh bhi bhr bi- bia bib bic bie bih bii bin bir bna bnb bnc bne bni bnn bnr bra brb bre brh bri brn brr c-- caa cab cac cae cah cai can car cba cbb cbc cbe cbh cbi cbn cbr cca ccb ccc cce cch cci ccn ccr ce- cea ceb cec cee ceh cei cen cer ch- cha chb chc che chh chi chn chr ci- cia cib cic cie cih cii cin cir cn- cna cnb cnc cne cnh cni cnn cnr cra crb crc cre crh cri crn crr eaa eab eac eae eah eai ean ear eba ebb ebc ebe ebh ebi ebn ebr ec- eca ecb ecc ece ech eci ecn ecr eea eeb eec eee een eer eha ehb ehc ehe ehh ehi ehn ehr eia eib eic eie eii ein eir en- ena enb enc ene enh eni enn enr era erb erc ere erh eri ern err h-i haa hab hac hae hah hai han har hba hbb hbc hbe hbh hbi hbn hbr hca hcb hcc hce hch hci hcn hcr he- hea heb hec hee heh hei hen her hha hhb hhc hhe hhh hhi hhn hhr hia hib hic hie hih hii hin hir hna hnb hnc hne hnh hnn hr- hra hrb hrc hre hrh hri hrn hrr ia- iaa iab iac iae iah iai ian iar iba ibb ibc ibe ibh ibi ibn ibr ica icb icc ice ich ici icn icr ie- iea iec iee iei ien ier iha ihb ihc ihe ihh ihi ihn ihr iia iib iic iie iih iii iin iir in- ina inb inc ine inh ini inn inr ir- ira irb irc ire iri irn irr n-i naa nab nac nae nah nai nan nar nba nbb nbc nbe nbi nbn nbr nca ncb ncc nce nch nci ncn ncr ne- nea neb nec nee neh nei nen ner nha nhb nhc nhe nhh nhi nhn nhr nia nib nic nie nih nii nin nir nna nnb nnc nne nnh nni nnn nra nrb nrc nre nri nrn nrr ra- raa rab rac rae rah rai ran rar rba rbb rbc rbe rbh rbi rbn rbr rca rcb rcc rce rch rci rcn rcr re- rea reb rec ree reh rei ren rer rh- rha rhb rhc rhe rhh rhi rhn rhr ria rib ric rie rih rii rin rir rna rnb rnc rnh rni rnn rnr rra rrb rrc rrh rri rrn rrr