-ol l-p lll llo llp lls lol loo lop los lox lpl lpo lpp lps lpx lsl lso lsp lss lxo lxx oll olo olp ols oo- ool ooo oop oos oox op- opl opo opp ops opx os- osl oso osp oss osx ox- oxo oxx p-p pll plo plp pls plx pol poo pop pos pox ppl ppo ppp pps ppx ps- psl pso psp pss psx pxl pxs sll slo slp sls slx sol soo sop sos sox spl spo spp sps spx ss- ssl sso ssp sss ssx sxl sxs xls xoo xop xos xox xpl xpo xpp xps xsl xsp xss xxl xxo xxp xxx