cccc cccs ccnc ccnr ccns ccrc ccrs ccrt ccsn ccss ccst cctc cctt cnrc cnrr cnrt cnss cntc cntr crcc crcr crns crrt crss crst crtc crts cscc cscr cscs csrc csrs cssr cstc cstr csts ctns ctrc ctrn ctrs ctsc ctsn ctss cttn ctts nccc nccn nccr nccs ncct ncnc ncrc ncsc ncss ncst nctc nctr nnnn nnss nntn nrcs nrrc nrsc nrts nscc nscs nsnr nsrc nssc nssr nsss nstc nsts ntcc ntrc ntsc ntss nttr rccc rccs rcnr rcsc rcss rctc rcts rncs rnnt rrrr rscc rscn rscs rsnn rsnr rsts rtcc rtns rtss rtts sccc sccs scct scnr scnt scr- scrc scrn scrs scsc scsn scsr scst sctc sctn sctr scts sncc snns snrs sntr srcc srct srnn srtr sscc sscs ssns ssrc ssrs sssc ssss sstc ssts stcc stcs stnn stnr stns strc strn strs stss sttc sttr tccc tcnn tctc tcts tncc tnts trcc trst trtc trtr tscc tssr tsst tstc tsts ttcn ttss tttt