c-- ccc ccd cce ccf ccl ccs ccu cdc cdd cde cdf cdl cds cdu ce- cec ced cee cef cel ces ceu cfc cfd cfe cff cfl cfs cfu cl- clc cld cle clf cll cls clu csc csd cse csf csl css csu cuc cud cue cuf cul cus cuu dcc dcd dce dcf dcl dcs dcu ddc ddd dde ddf ddl dds ddu de- dec ded dee def del des deu dfc dfd dfe dff dfl dfs dfu dl- dlc dld dle dlf dll dls dlu dsc dsd dse dsf dsl dss dsu duc dud due duf dul dus ec- ecc ecd ece ecf ecl ecs ecu ed- edc edd ede edf edl eds edu eec eed eee eef eel ees ef- efc efd efe eff efl efs elc eld ele elf ell els elu es- esc esd ese esf esl ess esu eu- euc eud eue euf eul eus fcc fcd fce fcf fcl fcs fcu fdc fdd fde fdf fdl fds fdu fec fed fee fef fel fes feu ffc ffd ffe fff ffl ffs ffu flc fld fle flf fll fls flu fsc fsd fse fsf fsl fss fsu fud fue fuf ful fus fuu lcc lcd lce lcf lcl lcs lcu ldc ldd lde ldf ldl lds ldu lec led lee lef lel les leu lfc lfd lfe lff lfl lfs lfu llc lld lle llf lll lls llu lsc lsd lse lsf lsl lss lsu luc lud lue luf lul lus luu scc scd sce scf scl scs scu sdc sdd sde sdf sdl sds sdu se- sec sed see sef sel ses seu sfc sfd sfe sff sfl sfs sfu slc sld sle slf sll sls slu ss- ssc ssd sse ssf ssl sss ssu suc sud sue suf sul sus suu ucc ucd uce ucf ucl ucs ucu udc udd ude udf udl uds udu uec ued uee uef uel ues ufc ufd ufe uff ufl ufs ufu ulc uld ule ulf ull uls ulu usc usd use usf usl uss usu uuc uue uus uuu