-er c-- ccc ccd cce ccl ccr ccu ccx cdc cdd cde cdl cdr cdu cdx ce- cec ced cee cel cer ceu cex cl- clc cld cle cll clr clu clx crc crd cre crl crr cru crx cuc cud cue cul cur cuu cxc cxl cxr cxx dcc dcd dce dcl dcr dcu dcx ddc ddd dde ddl ddr ddu ddx de- dec ded dee del der deu dex dl- dlc dld dle dll dlr dlu dlx drc drd dre drl drr dru drx duc dud due dul dur dux dxc dxd dxl dxr dxx ec- ecc ecd ece ecl ecr ecu ecx ed- edc edd ede edl edr edu edx eec eed eee eel eer eex elc eld ele ell elr elu elx erc erd ere erl err eru eu- euc eud eue eul eur eux ex- exc exd exe exl exr exu exx lcc lcd lce lcl lcr lcu lcx ldc ldd lde ldl ldr ldu lec led lee lel ler leu lex llc lld lle lll llr llu lrc lrd lrr lru luc lud lue lul lur luu lux lxc lxd lxr lxx rcc rcd rce rcl rcr rcu rcx rdc rdd rde rdl rdr rdu rdx re- rec red ree rel rer reu rex rlc rld rle rll rlr rlu rrc rrd rrl rrr rru ruc rud rue rur ruu rux rxr ucc ucd uce ucl ucr ucu udc udd ude udl udr udu udx uec ued uee uel uer ulc uld ule ull ulr ulu ur- urc urd ure url urr uru urx uuc uue uur uuu uxc uxr uxu xcd xcl xcr xcx xdc xde xdr xed xee xel xer xeu xex xld xlr xrc xrd xrx xue xul xxl xxx