-er -ic a-a a-b a-c a-i aaa aab aac aad aae aah aai aao aar ab- aba abb abc abd abe abh abi abo abr ac- aca acb acc acd ace ach aci aco acr ad- ada adb adc add ade adh adi ado adr aea aeb aec aed aee aeh aei aeo aer aha ahb ahc ahd ahe ahh ahi aho ahr ai- aia aib aic aid aie aih aii aio air aoa aob aoc aod aoe aoh aoi aoo aor ar- ara arb arc ard are arh ari aro arr baa bab bac bad bae bah bai bao bar bba bbb bbc bbd bbe bbh bbi bbo bbr bca bcb bcc bcd bce bch bci bco bcr bda bdb bdc bdd bde bdh bdi bdo bdr be- bea beb bec bed bee beh bei beo ber bha bhb bhc bhd bhe bhh bhi bho bhr bi- bia bib bic bid bie bih bii bio bir boa bob boc bod boe boh boi boo bor bra brb brd bre brh bri bro brr c-- caa cab cac cad cae cah cai cao car cba cbb cbc cbd cbe cbh cbi cbo cbr cca ccb ccc ccd cce cch cci cco ccr cda cdb cdc cdd cde cdh cdi cdo cdr ce- cea ceb cec ced cee ceh cei ceo cer ch- cha chb chc chd che chh chi cho chr ci- cia cib cic cid cie cih cii cio cir co- coa cob coc cod coe coh coi coo cor cra crb crc crd cre crh cri cro crr daa dab dac dad dae dah dai dao dar dba dbb dbc dbd dbe dbh dbi dbo dbr dca dcb dcc dcd dce dci dco dcr dda ddb ddc ddd dde ddh ddi ddo ddr de- dea deb dec ded dee deh dei deo der dh- dha dhb dhc dhd dhe dhh dhi dho dhr di- dia dib dic did die dih dii dio dir doa dob doc dod doe doh doi doo dor dra drb drc drd dre dri dro drr eaa eab eac ead eae eah eai eao ear eba ebb ebc ebd ebe ebh ebi ebo ebr ec- eca ecb ecc ecd ece ech eci eco ecr ed- eda edb edc edd ede edh edi edo edr eea eeb eec eed eee eeo eer eha ehb ehc ehd ehe ehh ehi eho ehr eia eib eic eid eie eii eio eir eo- eoa eob eoc eod eoe eoh eoi eoo eor era erb erc erd ere erh eri ero err h-i haa hab hac had hae hah hai hao har hba hbb hbc hbd hbe hbh hbi hbo hbr hca hcb hcc hcd hce hch hci hco hcr hda hdb hdc hdd hde hdh hdi hdo hdr he- hea heb hec hed hee heh hei heo her hha hhb hhc hhd hhe hhh hhi hho hhr hia hib hic hid hie hih hii hio hir hoa hob hoc hod hoe hoh hoi hoo hor hr- hra hrb hrc hrd hre hrh hri hro hrr i-d ia- iaa iab iac iad iae iah iai iao iar iba ibb ibc ibd ibe ibh ibi ibo ibr ica icb icc icd ice ich ici ico icr ida idb idc idd ide idh idi ido idr ie- iea iec ied iee iei ier iha ihb ihc ihd ihe ihh ihi iho ihr iia iib iic iid iie iih iii iio iir io- ioa iob ioc iod ioe ioh ioi ioo ior ir- ira irb irc ird ire iri iro irr o-i oaa oab oac oad oae oah oai oao oar ob- oba obb obc obd obe obh obi obo obr oc- oca ocb occ ocd och oci oco ocr oda odb odc odd ode odh odi odo odr oea oeb oec oed oee oeh oei oeo oer oha ohc ohd ohe ohh ohi oho ohr oia oib oic oid oie oii oio oir oo- ooa oob ooc ood ooh ooi ooo oor or- ora orb orc ord ore orh ori oro orr ra- raa rab rac rad rae rah rai rao rar rba rbb rbc rbd rbe rbh rbi rbo rbr rca rcb rcc rcd rce rch rci rco rcr rda rdb rdc rdd rde rdh rdi rdo rdr re- rea reb rec red ree reh rei reo rer rh- rha rhb rhc rhd rhe rhh rhi rho rhr ria rib ric rid rie rih rii rio rir roa rob roc rod roe roh roi roo ror rra rrb rrc rrd rrh rri rrr