-er -ic a-a a-b a-c a-i aaa aab aac aae aai aak aam aar ab- aba abb abc abe abi abk abm abr ac- aca acb acc ace aci ack acm acr aea aeb aec aee aei aek aem aer ai- aia aib aic aie aii aik aim air aka akb akc ake aki akk akm akr ama amb amc ame ami amk amm amr ar- ara arb arc are ari ark arm arr baa bab bac bae bai bak bam bar bba bbb bbc bbe bbi bbk bbm bbr bca bcb bcc bce bci bck bcm bcr be- bea beb bec bee bei bek bem ber bi- bia bib bic bie bii bik bim bir bka bkb bkc bke bkk bkm bkr bma bmb bmc bme bmi bmk bmm bmr bra brb bre bri brk brm brr c-- caa cab cac cae cai cak cam car cba cbb cbc cbe cbi cbk cbm cbr cca ccb ccc cce cci cck ccm ccr ce- cea ceb cec cee cei cek cem cer ci- cia cib cic cie cii cik cim cir cka ckb ckc cki ckm cma cmb cmc cme cmi cmk cmm cmr cra crb crc cre cri crk crm crr eaa eab eac eae eai eak eam ear eba ebb ebc ebe ebi ebk ebm ebr ec- eca ecb ecc ece eci eck ecm ecr eea eeb eec eee eek eem eer eia eib eic eie eii eik eim eir eka ekb ekc eke eki ekr em- ema emb emc eme emi emk emm emr era erb erc ere eri erk erm err ia- iaa iab iac iae iai iam iar iba ibb ibc ibe ibi ibk ibm ibr ica icb icc ice ici ick icm icr ie- iea iec iee iei iek iem ier iia iib iic iie iii iim iir ika ikb ikc ike iki ikk ikr im- ima imb imc ime imi imm ir- ira irb irc ire iri irk irm irr ka- kaa kab kac kae kai kak kam kar kba kbb kbc kbe kbi kbk kbm kbr kca kcb kcc kce kci kck kcm kcr ke- kea keb kec kee kei kek kem ker kia kib kic kie kii kik kim kir kkb kkc kke kki kkk kkm kkr kma kmb kmc kme kmi kmk kmm kra krc kri krk krr m-r maa mab mac mae mai mak mam mar mba mbb mbc mbe mbi mbk mbm mbr mc- mca mcb mcc mce mci mck mcm mcr mea meb mec mee mei mek mem mer mi- mia mib mic mie mii mik mim mir mka mkb mkc mke mkk mkm mkr mma mmb mmc mme mmi mmk mmm mmr mra mrb mrc mre mri mrk mrm mrr ra- raa rab rac rae rai rak ram rar rba rbb rbc rbe rbi rbk rbm rbr rca rcb rcc rce rci rcm rcr re- rea reb rec ree rei rek rem rer ria rib ric rie rii rik rim rir rkb rkc rke rkk rkm rma rmb rmc rme rmi rmm rmr rra rrb rrc rri rrk rrm rrr