pop por poy ppb ppc ppe pph ppi ppl ppn ppo ppp ppr prb prc pre prh pri prl prn pro prp prr pry py- pyb pyc pye pyl pyn pyo pyr rbb rbc rbe rbh rbi rbl rbn rbo rbp rbr rcb rcc rce rch rci rcl rcn rco rcp rcr re- reb rec ree reh rei rel ren reo rep rer rey rh- rhb rhc rhe rhh rhi rhl rhn rho rhp rhr rib ric rie rih rii ril rin rio rip rir riy rlc rle rlh rli rll rln rlo rlp rlr rly rnb rnc rnh rni rnn rno rnp rnr rny rob roc roe roh roi rol ron roo rop ror roy rpb rpc rpe rph rpi rpl rpn rpo rpp rpr rrb rrc rrh rri rrl rrn rrp rrr ry- ryc rye ryn ryo ryr ryy ybc ybe ybi ybl ybp ybr yby ycc yce ych yci ycl yco ycp ycy yeb yec yee yeh yei yel yen yeo yep yer yey yhc yhe yhi yie yih yii yin yio yip yir ylc yle yli yll ylr yly yne ynn ynp yny yob yoc yoe yoi yol yon yoo yop yor yoy ypl ypo yrc yre yrn yro yrp yyb yyc yye yyy