c-- ccc cck ccl ccs ccu ckc cks cl- clc clk cll cls clu csc csk csl css csu cuc cuk cul cus cuu kcc kck kcl kcs kcu kkc kkk kkl kks kku kl- klc kls klu ksc ksk ksl kss ksu kuc kuk kul kus kuu lcc lck lcl lcs lcu lkl lks llc llk lll lls llu lsc lsk lsl lss lsu luc luk lul lus luu scc sck scl scs scu sk- skc skk skl sks sku slc slk sll sls slu ss- ssc ssk ssl sss ssu suc suk sul sus suu ucc uck ucl ucs ucu ukc ukk ukl uku ulc ulk ull uls ulu usc usk usl uss usu uuc uus uuu