-er -ey -ic c-- ccc cce cch cci cco ccr ccx ce- cec cee ceh cei ceo cer cex cey ch- chc che chh chi cho chr chx chy ci- cic cie cih cii cio cir cix co- coc coe coh coi coo cor cox coy crc cre crh cri cro crr crx cry cxc cxh cxi cxo cxr cxx cyc cye cyo cyr ec- ecc ece ech eci eco ecr ecx eec eee eeo eer eex eey ehc ehe ehh ehi eho ehr eic eie eii eio eir eix eo- eoc eoe eoh eoi eoo eor erc ere erh eri ero err ery ex- exc exe exh exi exo exr exx exy eyc eye eyo eyr h-i hcc hce hch hci hco hcr hcy he- hec hee heh hei heo her hex hey hhc hhe hhh hhi hho hhr hhy hic hie hih hii hio hir hix hoc hoe hoh hoi hoo hor hox hoy hr- hrc hre hrh hri hro hrr hxc hy- hyc hye hyh hyi hyo hyr hyy icc ice ich ici ico icr icy ie- iec iee iei ier iex iey ihc ihe ihh ihi iho ihr ihy iic iie iih iii iio iir iix io- ioc ioe ioh ioi ioo ior ir- irc ire iri iro irr irx iry ixc ixe ixi ixy iyc iye iyo iyr iyy o-i oc- occ och oci oco ocr ocx oec oee oeh oei oeo oer oex oey ohc ohe ohh ohi oho ohr oic oie oii oio oir oo- ooc ooh ooi ooo oor oox or- orc ore orh ori oro orr orx ory ox- oxc oxi oxo oxx oxy oye oyi oyo rcc rce rch rci rco rcr rcx re- rec ree reh rei reo rer rex rey rh- rhc rhe rhh rhi rho rhr ric rie rih rii rio rir rix riy roc roe roh roi roo ror rox roy rrc rrh rri rrr rxr ry- ryc rye ryo ryr ryy xch xci xcr xcx xee xer xex xic xie xii xio xix xoc xoi xoo xor xox xrc xrx xry xxi xxo xxx xxy xyr xyy ycc yce ych yci yco ycy yec yee yeh yei yeo yer yex yey yhc yhe yhi yie yih yii yio yir yoc yoe yoi yoo yor yox yoy yrc yre yro yxe yxy yyc yye yyy