c-cd cccc cccf cccl cccm ccdc ccdf ccdm ccdn ccfc ccfd ccff ccfl cclc cclm ccmc ccmd ccmm ccnc ccnf ccnm cctc cctl cctt cddl cdmf cdnc cdnf cfcf cfcl cfcm cfcn cfln cfml cfnm cftc cftl clcd cldc clmd cltc cmcc cmll cmmc cmml cmmn cmtc cndd cntc cntf cntm ctcf ctfc cttn dccc dccl dcct dcfc dcml dctc dctm dddd ddlc dfcc dfdt dmcc dmcm dmdc dmdt dmft dmtf dmtn dntt dtcc dtfc fccf fcnl fdml fdnm fdtc fdtl ffcc ffff fftf flcl flnc fndd fndn fnlc ft-c ft-l ftcd ftfc lccc lccm lcdd lcfc lctl lctm ldcf lddm lfcc llcc lldc lllc llll lmcc lmfm lmln lmnt lndn lntc lntm ltcc ltfc ltnt lttc mccc mccd mccl mcdc mcdd mcdl mcfc mcfd mclt mcmc mcml mcmt mctc mdcc mdcl mddl mddm mdmc mdmf mdnt mfcc mftf mlcc mmcc mmcd mmcl mmcm mmct mmdc mmdf mmdl mmfd mmff mmmc mmmd mmmm mntn mtfc mtff mtld mtnt nccc nccf nccn ncct ncdc ncdn ncfc nclc ncln ncmm ncnc ncnd nctc ndcc ndmc ndnt ndtc nfct nfdc nfff nfld nftc nlcc nlcf nmdc nmff nmmc nmml nmnt nmtc nnmc nnmt nnnn nntn ntcc ntfc ntfl ntnd nttm tccc tcdd tcfc tcnn tctc tdff tfdc tftc tmcc tmcm tmnt tmtt tncc tndd tndf tnfc tnfl ttcn ttfc ttff ttfn ttml tttt