a-a a-i aaa aad aai aap aar aas ad- ada add adi adp adr ads ai- aia aid aii aip air ais ap- apa apd api app apr aps ar- ara ard ari arp arr ars as- asa asd asi asp asr ass daa dad dai dap dar das dda ddd ddi ddp ddr dds di- dia did dii dip dir dis dpa dpd dpi dpp dpr dps dra drd dri drp drr drs dsa dsd dsi dsp dsr dss i-d ia- iaa iad iai iap iar ias ida idd idi idp idr ids iia iid iii iip iir iis ipa ipd ipi ipp ipr ips ir- ira ird iri irp irr irs is- isa isd isi isp isr iss p-p paa pad pai pap par pas pda pdd pdi pdp pdr pds pia pid pii pip pir pis ppa ppd ppi ppp ppr pps pra prd pri prp prr prs ps- psa psd psi psp psr pss ra- raa rad rai rap rar ras rda rdd rdi rdp rdr rds ria rid rii rip rir ris rpa rpd rpi rpp rpr rps rra rrd rri rrp rrr rrs rsa rsd rsi rsp rsr rss saa sad sai sap sar sas sda sdd sdi sdp sdr sds sia sid sii sip sir sis spa spd spi spp spr sps sr- sra srd sri srp srr srs ss- ssa ssd ssi ssp ssr sss