-er -ic a-a a-b a-c a-i aaa aab aac aad aae aaf aai aak aar ab- aba abb abc abd abe abf abi abk abr ac- aca acb acc acd ace acf aci ack acr ad- ada adb adc add ade adf adi adk adr aea aeb aec aed aee aef aei aek aer af- afa afb afc afd afe aff afi afk afr ai- aia aib aic aid aie aif aii aik air aka akb akc akd ake aki akk akr ar- ara arb arc ard are arf ari ark arr baa bab bac bad bae baf bai bak bar bba bbb bbc bbd bbe bbf bbi bbk bbr bca bcb bcc bcd bce bcf bci bck bcr bda bdb bdc bdd bde bdf bdi bdk bdr be- bea beb bec bed bee bef bei bek ber bfa bfb bfc bfd bfe bff bfi bfr bi- bia bib bic bid bie bif bii bik bir bka bkb bkc bke bkf bkk bkr bra brb brd bre brf bri brk brr c-- caa cab cac cad cae caf cai cak car cba cbb cbc cbd cbe cbf cbi cbk cbr cca ccb ccc ccd cce ccf cci cck ccr cda cdb cdc cdd cde cdf cdi cdk cdr ce- cea ceb cec ced cee cef cei cek cer cfa cfb cfc cfd cfe cff cfi cfk cfr ci- cia cib cic cid cie cif cii cik cir cka ckb ckc ckd cki cra crb crc crd cre crf cri crk crr daa dab dac dad dae daf dai dak dar dba dbb dbc dbd dbe dbf dbi dbk dbr dca dcb dcc dcd dce dcf dci dck dcr dda ddb ddc ddd dde ddf ddi ddk ddr de- dea deb dec ded dee def dei dek der dfa dfb dfc dfd dfe dff dfi dfk dfr di- dia dib dic did die dif dii dik dir dka dkb dkc dke dki dkk dkr dra drb drc drd dre dri drk drr eaa eab eac ead eae eaf eai eak ear eba ebb ebc ebd ebe ebf ebi ebk ebr ec- eca ecb ecc ecd ece ecf eci eck ecr ed- eda edb edc edd ede edf edi edk edr eea eeb eec eed eee eef eek eer ef- efa efb efc efd efe eff efi efr eia eib eic eid eie eif eii eik eir eka ekb ekc ekd eke ekf eki ekr era erb erc erd ere erf eri erk err faa fab fac fad fae faf fai fak far fba fbb fbc fbd fbe fbf fbi fbk fbr fca fcb fcc fcd fce fcf fci fck fcr fda fdb fdc fdd fde fdf fdi fdk fdr fea feb fec fed fee fef fei fek fer ffa ffc ffd ffe fff ffi ffk ffr fia fib fic fid fie fif fii fik fir fka fkb fkc fkf fki fkk fra frb frc frd fre frf fri frk frr i-d i-f ia- iaa iab iac iad iae iaf iai iar iba ibb ibc ibd ibe ibf ibi ibk ibr ica icb icc icd ice icf ici ick icr ida idb idc idd ide idf idi idk idr ie- iea iec ied iee ief iei iek ier ifa ifb ifc ifd ife iff ifi ifr iia iib iic iid iie iif iii iir ika ikb ikc ike ikf iki ikk ikr ir- ira irb irc ird ire irf iri irk irr ka- kaa kab kac kad kae kaf kai kak kar kba kbb kbc kbd kbe kbf kbi kbk kbr kca kcb kcc kcd kce kci kck kcr kda kdb kdc kde kdf kdk kdr ke- kea keb kec ked kee kef kei kek ker kfa kfc kfd kff kfi kia kib kic kid kie kif kii kik kir kkb kkc kke kki kkk kkr kra krc krd krf kri krk krr ra- raa rab rac rad rae raf rai rak rar rba rbb rbc rbd rbe rbf rbi rbk rbr rca rcb rcc rcd rce rcf rci rcr rda rdb rdc rdd rde rdf rdi rdr re- rea reb rec red ree ref rei rek rer rfa rfb rfc rfd rfe rff rfi rfk rfr ria rib ric rid rie rif rii rik rir rkb rkc rke rkf rkk rra rrb rrc rrd rrf rri rrk rrr

a-ak a-be a-ii aaaa aaab aaac aaad aaae aaaf aaai aaar aaba aabb aabc aabd aabi aaca aacb aacc aacd aace aacf aaci aack aacr aada aadc aade aadi aaea aaec aafa aafb aafc aafd aaff aafi aaib aaic aaii aaka aake aara aarc aard aare aari abaa abab abac abad abae abaf abai abak abar abb- abba abbb abbe abbi abbr abca abcb abcc abcd abcf abci abcr abda abdi abec abed abee aber abff abia abib abic abid abie abir abra abrc abri acaa acab acac acad acae acai acar acba acca accc accd acce accf acci acda acdb acdc acde acdf acdi ace- acea acec aced acek acer acfc acfd acfe acfi aci- acia acic acid acie acif acir ackd acke acr- acra acrc acre acri acrr adaa adab adac adad adae adai adak adar adba adbc adbi adcc adci adda addc addd adde addi addr adea adeb adee ader adfa adfc adia adib adic adie adif adik adir adki adra adre aeac aeaf aebi aecb aeci aede aeer aeka aer- aera aerc aerd aeri afaa afad afak afar afca afcb afcc afci afdb afdc afee afek afer affa affc affi afia afib afid afif afik afir afka afkr afr- afra afrc afre afri aiai aiba aica aicc aicd aice aicf aicr aida aidb aidc aide aidi aidr aiea aiee aifd aiff aiia aiib aiic aiid aiir aika aike aiki aira aird aire airi akaa akae akai akar akca aked akee aker akia akid akie akif akik akir akka akki akr- akra akre arab arac arad arae araf arai arak arar arba arbe arbi arc- arca arce arci arda ardc arde ardf ardi area arec ared aree aref arei arek