c-- ccc ccf cck ccl ccs ccu cfc cff cfk cfl cfs cfu ckc cks cl- clc clf clk cll cls clu csc csf csk csl css csu cuc cuf cuk cul cus cuu fcc fcf fck fcl fcs fcu ffc fff ffk ffl ffs ffu fkc fkf fkk fkl flc flf fll fls flu fsc fsf fsk fsl fss fsu fuf fuk ful fus fuu kcc kck kcl kcs kcu kfc kff kfs kfu kkc kkk kkl kks kku kl- klc klf kls klu ksc ksf ksk ksl kss ksu kuc kuk kul kus kuu lcc lcf lck lcl lcs lcu lfc lff lfk lfl lfs lfu lkl lks llc llf llk lll lls llu lsc lsf lsk lsl lss lsu luc luf luk lul lus luu scc scf sck scl scs scu sfc sff sfk sfl sfs sfu sk- skc skf skk skl sks sku slc slf slk sll sls slu ss- ssc ssf ssk ssl sss ssu suc suf suk sul sus suu ucc ucf uck ucl ucs ucu ufc uff ufl ufs ufu ukc ukf ukk ukl uku ulc ulf ulk ull uls ulu usc usf usk usl uss usu uuc uus uuu