-er -ic -ol c-- ccc cce cch cci ccl cco ccr ccx ce- cec cee ceh cei cel ceo cer cex ch- chc che chh chi chl cho chr chx ci- cic cie cih cii cil cio cir cix cl- clc cle clh cli cll clo clr clx co- coc coe coh coi col coo cor cox crc cre crh cri crl cro crr crx cxc cxh cxi cxl cxo cxr cxx ec- ecc ece ech eci ecl eco ecr ecx eec eee eel eeo eer eex ehc ehe ehh ehi ehl eho ehr eic eie eii eil eio eir eix elc ele elh eli ell elo elr elx eo- eoc eoe eoh eoi eol eoo eor erc ere erh eri erl ero err ex- exc exe exh exi exl exo exr exx h-i hcc hce hch hci hcl hco hcr he- hec hee heh hei hel heo her hex hhc hhe hhh hhi hhl hho hhr hic hie hih hii hil hio hir hix hlc hle hlh hli hll hlo hlr hlx hoc hoe hoh hoi hol hoo hor hox hr- hrc hre hrh hri hrl hro hrr hxc hxl icc ice ich ici icl ico icr ie- iec iee iei iel ier iex ihc ihe ihh ihi ihl iho ihr iic iie iih iii iil iio iir iix il- ilc ile ilh ili ill ilo ilr ilx io- ioc ioe ioh ioi iol ioo ior ir- irc ire iri irl iro irr irx ixc ixe ixi ixl lcc lce lch lci lcl lco lcr lcx lec lee leh lei lel leo ler lex lhc lhh lhi lho lhr lhx lic lie lih lii lil lio lir lix llc lle lli lll llo llr loc loe loh loi lol loo lor lox lrc lrh lri lro lrr lxc lxi lxo lxr lxx o-i oc- occ och oci ocl oco ocr ocx oec oee oeh oei oel oeo oer oex ohc ohe ohh ohi ohl oho ohr oic oie oii oil oio oir olc ole oli oll olo oo- ooc ooh ooi ool ooo oor oox or- orc ore orh ori orl oro orr orx ox- oxc oxi oxo oxx rcc rce rch rci rcl rco rcr rcx re- rec ree reh rei rel reo rer rex rh- rhc rhe rhh rhi rhl rho rhr ric rie rih rii ril rio rir rix rlc rle rlh rli rll rlo rlr roc roe roh roi rol roo ror rox rrc rrh rri rrl rrr rxr xch xci xcl xcr xcx xee xel xer xex xic xie xii xio xix xli xlr xoc xoi xoo xor xox xrc xrx xxi xxl xxo xxx