c-- ccc ccd cce ccl ccm cdc cdd cde cdl cdm ce- cec ced cee cel cem cl- clc cld cle cll clm cmc cmd cme cml cmm dcc dcd dce dcl dcm ddc ddd dde ddl ddm de- dec ded dee del dem dl- dlc dld dle dll dlm dmc dmd dme dml dmm ec- ecc ecd ece ecl ecm ed- edc edd ede edl edm eec eed eee eel eem elc eld ele ell elm em- emc emd eme eml emm lcc lcd lce lcl lcm ldc ldd lde ldl ldm lec led lee lel lem llc lld lle lll llm lmc lmd lme lml lmm mc- mcc mcd mce mcl mcm mdc mdd mde mdl mdm mec med mee mel mem mlc mld mle mll mlm mmc mmd mme mml mmm