poo pop por pox ppa ppc ppd ppg pph ppi ppl ppo ppp ppr ppx pra prc prd prg prh pri prl pro prp prr prx pxc pxg pxl pxr ra- raa rac rad rag rah rai ral rao rap rar rax rca rcc rcd rcg rch rci rcl rco rcp rcr rcx rda rdc rdd rdg rdh rdi rdl rdo rdp rdr rdx rga rgc rgd rgg rgh rgi rgo rgp rgr rgx rh- rha rhc rhd rhg rhh rhi rhl rho rhp rhr ria ric rid rig rih rii ril rio rip rir rix rla rlc rld rlg rlh rli rll rlo rlp rlr roa roc rod rog roh roi rol roo rop ror rox rpa rpc rpd rpg rph rpi rpl rpo rpp rpr rpx rra rrc rrd rrg rrh rri rrl rrp rrr rxp rxr xaa xac xad xag xal xap xar xcd xch xci xcl xcp xcr xcx xda xdc xdh xdi xdr xgi xgl xgp xhd xhp xia xic xii xio xix xla xld xlg xli xlr xoa xoc xod xog xoi xoo xop xor xox xpa xpc xpd xpg xpl xpo xpp xrc xrd xrx xxi xxl xxo xxp xxx