-er -ic c-- ccc cce ccf cci cck ccl ccr ccu ccx ce- cec cee cef cei cek cel cer ceu cex cfc cfe cff cfi cfk cfl cfr cfu cfx ci- cic cie cif cii cik cil cir ciu cix ckc cki ckx cl- clc cle clf cli clk cll clr clu clx crc cre crf cri crk crl crr cru crx cuc cue cuf cui cuk cul cur cuu cxc cxf cxi cxk cxl cxr cxx ec- ecc ece ecf eci eck ecl ecr ecu ecx eec eee eef eek eel eer eex ef- efc efe eff efi efl efr efx eic eie eif eii eik eil eir eiu eix ekc eke ekf eki ekl ekr eku elc ele elf eli elk ell elr elu elx erc ere erf eri erk erl err eru eu- euc eue euf eui eul eur eux ex- exc exe exi exl exr exu exx fcc fce fcf fci fck fcl fcr fcu fcx fec fee fef fei fek fel fer feu fex ffc ffe fff ffi ffk ffl ffr ffu ffx fic fie fif fii fik fil fir fiu fix fkc fkf fki fkk fkl flc fle flf fli fll flr flu flx frc fre frf fri frk frl frr fru fue fuf fui fuk ful fur fuu fux fxe fxi fxr fxu fxx i-f icc ice icf ici ick icl icr icu ie- iec iee ief iei iek iel ier iex ifc ife iff ifi ifl ifr ifu ifx iic iie iif iii iil iir iiu iix ikc ike ikf iki ikk ikl ikr iku ikx il- ilc ile ilf ili ilk ill ilr ilu ilx ir- irc ire irf iri irk irl irr iru irx iu- iuc iue iui iur ixc ixe ixi ixl kcc kce kci kck kcl kcr kcu kcx ke- kec kee kef kei kek kel ker kex kfc kff kfi kfu kfx kic kie kif kii kik kil kir kiu kix kkc kke kki kkk kkl kkr kku kl- klc klf kli klr klu klx krc krf kri krk krl krr kru kuc kue kui kuk kul kur kuu kxl lcc lce lcf lci lck lcl lcr lcu lcx lec lee lef lei lek lel ler leu lex lfc lfe lff lfi lfk lfl lfr lfu lfx lic lie lif lii lik lil lir liu lix lkl lkr llc lle llf lli llk lll llr llu lrc lrf lri lrk lrr lru luc lue luf lui luk lul lur luu lux lxc lxi lxr lxx rcc rce rcf rci rcl rcr rcu rcx re- rec ree ref rei rek rel rer reu rex rfc rfe rff rfi rfk rfl rfr rfu ric rie rif rii rik ril rir rix rkc rke rkf rkk rku rlc rle rlf rli rll rlr rlu rrc rrf rri rrk rrl rrr rru ruc rue ruf rui ruk rur ruu rux rxr ucc uce ucf uci uck ucl ucr ucu uec uee uef uei uel uer ufc ufe uff ufi ufl ufr ufu ufx uic uie uif uii uil uir uiu ukc uke ukf uki ukk ukl ukr uku ulc ule ulf uli ulk ull ulr ulu ur- urc ure urf uri urk url urr uru urx uuc uue uur uuu uxc uxf uxr uxu xcf xci xcl xcr xcx xee xel xer xeu xex xfe xfl xfx xic xie xii xiu xix xke xkl xlf xli xlr xrc xrf xrx xue xui xul xxi xxl xxx