c-- ccc ccd cce ccl ccs ccu cdc cdd cde cdl cds cdu ce- cec ced cee cel ces ceu cl- clc cld cle cll cls clu csc csd cse csl css csu cuc cud cue cul cus cuu dcc dcd dce dcl dcs dcu ddc ddd dde ddl dds ddu de- dec ded dee del des deu dl- dlc dld dle dll dls dlu dsc dsd dse dsl dss dsu duc dud due dul dus ec- ecc ecd ece ecl ecs ecu ed- edc edd ede edl eds edu eec eed eee eel ees elc eld ele ell els elu es- esc esd ese esl ess esu eu- euc eud eue eul eus lcc lcd lce lcl lcs lcu ldc ldd lde ldl lds ldu lec led lee lel les leu llc lld lle lll lls llu lsc lsd lse lsl lss lsu luc lud lue lul lus luu scc scd sce scl scs scu sdc sdd sde sdl sds sdu se- sec sed see sel ses seu slc sld sle sll sls slu ss- ssc ssd sse ssl sss ssu suc sud sue sul sus suu ucc ucd uce ucl ucs ucu udc udd ude udl uds udu uec ued uee uel ues ulc uld ule ull uls ulu usc usd use usl uss usu uuc uue uus uuu