otr ott p-p paa pab pac pae pai pal pan pao pap par pat pba pbb pbc pbe pbi pbl pbn pbo pbp pbr pbt pca pcb pcc pce pci pcl pcn pco pcp pcr pct pea peb pec pee pei pel pen peo pep per pet pia pib pic pie pii pil pin pio pip pir pit pla plb plc ple pli pll pln plo plp plr plt pn- pna pnb pnc pne pni pnl pnn pno pnp pnr pnt poa pob poc poe poi pol pon poo pop por pot ppa ppb ppc ppe ppi ppl ppn ppo ppp ppr ppt pra prb prc pre pri prl prn pro prp prr prt pt- pta ptb ptc pte pti ptl ptn pto ptp ptr ptt ra- raa rab rac rae rai ral ran rao rap rar rat rba rbb rbc rbe rbi rbl rbn rbo rbp rbr rbt rca rcb rcc rce rci rcl rcn rco rcp rcr rct re- rea reb rec ree rei rel ren reo rep rer ret ria rib ric rie rii ril rin rio rip rir rit rla rlc rle rli rll rln rlo rlp rlr rlt rna rnb rnc rni rnn rno rnp rnr rnt roa rob roc roe roi rol ron roo rop ror rot rpa rpb rpc rpe rpi rpl rpn rpo rpp rpr rpt rra rrb rrc rri rrl rrn rrp rrr rrt rta rtb rtc rte rti rtl rtn rto rtp rtr rtt taa tab tac tae tai tal tan tao tap tar tat tba tbb tbc tbe tbi tbl tbn tbo tbp tbr tbt tca tcb tcc tce tci tcl tcn tco tcp tcr tct te- tea teb tec tee tei tel ten teo tep ter tet tia tib tic tie tii til tin tio tip tir tit tla tlc tle tli tll tln tlo tlp tlr tlt tna tnb tnc tne tni tnl tnn tno tnp tnr tnt to- toa tob toc toe toi tol ton too top tor tot tpa tpb tpc tpe tpi tpl tpn tpo tpp tpr tpt tra trb trc tre tri trl trn tro trp trr trt tta ttb ttc tte tti ttl ttn tto ttp ttr ttt