-er -ic c-- ccc ccd cce cci cco ccr ccs ccu ccx cdc cdd cde cdi cdo cdr cds cdu cdx ce- cec ced cee cei ceo cer ces ceu cex ci- cic cid cie cii cio cir cis ciu cix co- coc cod coe coi coo cor cos cou cox crc crd cre cri cro crr crs cru crx csc csd cse csi cso csr css csu csx cuc cud cue cui cuo cur cus cuu cxc cxi cxo cxr cxs cxx dcc dcd dce dci dco dcr dcs dcu dcx ddc ddd dde ddi ddo ddr dds ddu ddx de- dec ded dee dei deo der des deu dex di- dic did die dii dio dir dis diu dix doc dod doe doi doo dor dos dou dox drc drd dre dri dro drr drs dru drx dsc dsd dse dsi dso dsr dss dsu dsx duc dud due dui duo dur dus dux dxc dxd dxi dxo dxr dxs dxx ec- ecc ecd ece eci eco ecr ecs ecu ecx ed- edc edd ede edi edo edr eds edu edx eec eed eee eeo eer ees eex eic eid eie eii eio eir eis eiu eix eo- eoc eod eoe eoi eoo eor eos eou erc erd ere eri ero err ers eru es- esc esd ese esi eso esr ess esu esx eu- euc eud eue eui eur eus eux ex- exc exd exe exi exo exr exs exu exx i-d icc icd ice ici ico icr ics icu idc idd ide idi ido idr ids idu idx ie- iec ied iee iei ier ies iex iic iid iie iii iio iir iis iiu iix io- ioc iod ioe ioi ioo ior ios iou ir- irc ird ire iri iro irr irs iru irx is- isc isd ise isi iso isr iss isu iu- iuc iud iue iui iur ius ixc ixe ixi o-i oc- occ ocd oci oco ocr ocs ocu ocx odc odd ode odi odo odr ods odu oec oed oee oei oeo oer oes oex oic oid oie oii oio oir ois oiu oo- ooc ood ooi ooo oor oos oox or- orc ord ore ori oro orr ors oru orx os- osc osd ose osi oso osr oss osu osx ou- ouc oud oue oui ouo our ous ox- oxc oxi oxo oxx rcc rcd rce rci rco rcr rcs rcu rcx rdc rdd rde rdi rdo rdr rds rdu rdx re- rec red ree rei reo rer res reu rex ric rid rie rii rio rir ris rix roc rod roe roi roo ror ros rou rox rrc rrd rri rrr rrs rru rsc rsd rse rsi rso rsr rss rsu rsx ruc rud rue rui ruo rur rus ruu rux rxr rxs scc scd sce sci sco scr scs scu scx sdc sdd sde sdi sdo sdr sds sdu se- sec sed see sei seo ser ses seu sex sic sid sie sii sio sir sis siu six soc sod soe soi soo sor sos sou sox sr- src srd sre sri sro srr srs srx ss- ssc ssd sse ssi sso ssr sss ssu ssx suc sud sue sui suo sur sus suu sux sxc sxi sxs sxu ucc ucd uce uci uco ucr ucs ucu udc udd ude udi udo udr uds udu udx uec ued uee uei uer ues uic uid uie uii uio uir uis uiu uoc uod uoe uoo uor uos uox ur- urc urd ure uri uro urr urs uru urx usc usd use usi uso usr uss usu usx uuc uue uur uus uuu uxc uxo uxr uxu xcd xci xcr xcx xdc xde xdi xdr xds xed xee xer xes xeu xex xic xie xii xio xis xiu xix xoc xod xoi xoo xor xos xox xrc xrd xrx xsc xsi xss xue xui xus xxi xxo xxx