-al -ol a-a a-c aaa aac aal aao aar aax ac- aca acc acl aco acr acx al- ala alc all alo alr alx aoa aoc aol aoo aor aox ar- ara arc arl aro arr arx ax- axa axl axo axr axx c-- caa cac cal cao car cax cca ccc ccl cco ccr ccx cl- cla clc cll clo clr clx co- coa coc col coo cor cox cra crc crl cro crr crx cxc cxl cxo cxr cxx la- laa lac lal lao lar lax lca lcc lcl lco lcr lcx lla llc lll llo llr loa loc lol loo lor lox lra lrc lro lrr lxc lxo lxr lxx oaa oac oal oao oar oax oc- oca occ ocl oco ocr ocx ola olc oll olo oo- ooa ooc ool ooo oor oox or- ora orc orl oro orr orx ox- oxa oxc oxo oxx ra- raa rac ral rao rar rax rca rcc rcl rco rcr rcx rla rlc rll rlo rlr roa roc rol roo ror rox rra rrc rrl rrr rxr xaa xac xal xar xcl xcr xcx xla xlr xoa xoc xoo xor xox xrc xrx xxl xxo xxx