-er -ic a-a a-b a-c a-i aaa aab aac aae aaf aah aai aao aar ab- aba abb abc abe abf abh abi abo abr ac- aca acb acc ace acf ach aci aco acr aea aeb aec aee aef aeh aei aeo aer af- afa afb afc afe aff afh afi afo afr aha ahb ahc ahe ahf ahh ahi aho ahr ai- aia aib aic aie aif aih aii aio air aoa aob aoc aoe aof aoh aoi aoo aor ar- ara arb arc are arf arh ari aro arr baa bab bac bae baf bah bai bao bar bba bbb bbc bbe bbf bbh bbi bbo bbr bca bcb bcc bce bcf bch bci bco bcr be- bea beb bec bee bef beh bei beo ber bfa bfb bfc bfe bff bfh bfi bfo bfr bha bhb bhc bhe bhf bhh bhi bho bhr bi- bia bib bic bie bif bih bii bio bir boa bob boc boe bof boh boi boo bor bra brb bre brf brh bri bro brr c-- caa cab cac cae caf cah cai cao car cba cbb cbc cbe cbf cbh cbi cbo cbr cca ccb ccc cce ccf cch cci cco ccr ce- cea ceb cec cee cef ceh cei ceo cer cfa cfb cfc cfe cff cfh cfi cfo cfr ch- cha chb chc che chf chh chi cho chr ci- cia cib cic cie cif cih cii cio cir co- coa cob coc coe cof coh coi coo cor cra crb crc cre crf crh cri cro crr eaa eab eac eae eaf eah eai eao ear eba ebb ebc ebe ebf ebh ebi ebo ebr ec- eca ecb ecc ece ecf ech eci eco ecr eea eeb eec eee eef eeo eer ef- efa efb efc efe eff efh efi efo efr eha ehb ehc ehe ehf ehh ehi eho ehr eia eib eic eie eif eii eio eir eo- eoa eob eoc eoe eof eoh eoi eoo eor era erb erc ere erf erh eri ero err faa fab fac fae faf fah fai fao far fba fbb fbc fbe fbf fbh fbi fbo fbr fca fcb fcc fce fcf fci fco fcr fea feb fec fee fef feh fei feo fer ffa ffc ffe fff ffh ffi ffo ffr fha fhb fhc fhe fhf fhh fhi fho fhr fia fib fic fie fif fih fii fir foa fob foc foe fof foh foi foo for fra frb frc fre frf frh fri fro frr h-i haa hab hac hae haf hah hai hao har hba hbb hbc hbe hbf hbh hbi hbo hbr hca hcb hcc hce hcf hch hci hco hcr he- hea heb hec hee hef heh hei heo her hfa hfb hfc hfe hff hfh hfi hfo hfr hha hhb hhc hhe hhf hhh hhi hho hhr hia hib hic hie hif hih hii hio hir hoa hob hoc hoe hof hoh hoi hoo hor hr- hra hrb hrc hre hrf hrh hri hro hrr i-f ia- iaa iab iac iae iaf iah iai iao iar iba ibb ibc ibe ibf ibh ibi ibo ibr ica icb icc ice icf ich ici ico icr ie- iea iec iee ief iei ier ifa ifb ifc ife iff ifi ifo ifr iha ihb ihc ihe ihf ihh ihi iho ihr iia iib iic iie iif iih iii iio iir io- ioa iob ioc ioe iof ioh ioi ioo ior ir- ira irb irc ire irf iri iro irr o-i oaa oab oac oae oaf oah oai oao oar ob- oba obb obc obe obf obh obi obo obr oc- oca ocb occ ocf och oci oco ocr oea oeb oec oee oef oeh oei oeo oer of- ofa ofb ofc ofe off ofi ofo ofr oha ohc ohe ohf ohh ohi oho ohr oia oib oic oie oif oii oio oir oo- ooa oob ooc oof ooh ooi ooo oor or- ora orb orc ore orf orh ori oro orr ra- raa rab rac rae raf rah rai rao rar rba rbb rbc rbe rbf rbh rbi rbo rbr rca rcb rcc rce rcf rch rci rco rcr re- rea reb rec ree ref reh rei reo rer rfa rfb rfc rfe rff rfh rfi rfo rfr rh- rha rhb rhc rhe rhf rhh rhi rho rhr ria rib ric rie rif rih rii rio rir roa rob roc roe rof roh roi roo ror rra rrb rrc rrf rrh rri rrr