c-- ccc ccl ccr ccs cct cl- clc cll clr cls clt crc crl crr crs crt csc csl csr css cst ctc ctl ctr cts ctt lcc lcl lcr lcs lct llc lll llr lls llt lrc lrr lrs lrt lsc lsl lsr lss lst ltc ltl ltr lts ltt rcc rcl rcr rcs rct rlc rll rlr rls rlt rrc rrl rrr rrs rrt rsc rsl rsr rss rst rtc rtl rtr rts rtt scc scl scr scs sct slc sll slr sls slt sr- src srl srr srs srt ss- ssc ssl ssr sss sst stc stl str sts stt tcc tcl tcr tcs tct tlc tll tlr tls tlt trc trl trr trs trt tsc tsl tsr tss tst ttc ttl ttr tts ttt