-er -ic c-- ccc cce cci ccl ccr cct ccu ccx ce- cec cee cei cel cer cet ceu cex ci- cic cie cii cil cir cit ciu cix cl- clc cle cli cll clr clt clu clx crc cre cri crl crr crt cru crx ctc cte cti ctl ctr ctt ctu ctx cuc cue cui cul cur cut cuu cxc cxi cxl cxr cxt cxx ec- ecc ece eci ecl ecr ect ecu ecx eec eee eel eer eet eex eic eie eii eil eir eit eiu eix elc ele eli ell elr elt elu elx erc ere eri erl err ert eru etc ete eti etl etr ett etu etx eu- euc eue eui eul eur eut eux ex- exc exe exi exl exr ext exu exx icc ice ici icl icr ict icu ie- iec iee iei iel ier iet iex iic iie iii iil iir iit iiu iix il- ilc ile ili ill ilr ilt ilu ilx ir- irc ire iri irl irr irt iru irx itc ite iti itl itt itu itx iu- iuc iue iui iur iut ixc ixe ixi ixl lcc lce lci lcl lcr lct lcu lcx lec lee lei lel ler let leu lex lic lie lii lil lir lit liu lix llc lle lli lll llr llt llu lrc lri lrr lrt lru ltc lte lti ltl ltr ltt ltu ltx luc lue lui lul lur lut luu lux lxc lxi lxr lxx rcc rce rci rcl rcr rct rcu rcx re- rec ree rei rel rer ret reu rex ric rie rii ril rir rit rix rlc rle rli rll rlr rlt rlu rrc rri rrl rrr rrt rru rtc rte rti rtl rtr rtt rtu rtx ruc rue rui rur rut ruu rux rxr t-x tcc tce tci tcl tcr tct tcu tcx te- tec tee tei tel ter tet teu tex tic tie tii til tir tit tiu tix tlc tle tli tll tlr tlt tlu tlx trc tre tri trl trr trt tru trx ttc tte tti ttl ttr ttt ttu ttx tuc tue tui tul tur tut tuu tux txe txi txl txt txu ucc uce uci ucl ucr uct ucu uec uee uei uel uer uet uic uie uii uil uir uit uiu ulc ule uli ull ulr ult ulu ur- urc ure uri url urr urt uru urx utc ute uti utl utr utt utu utx uuc uue uur uut uuu uxc uxr uxt uxu xci xcl xcr xcx xee xel xer xet xeu xex xic xie xii xit xiu xix xli xlr xlt xrc xrt xrx xtc xti xtr xtx xue xui xul xxi xxl xxx