a-a a-i aaa aad aai aap aas ad- ada add adi adp ads ai- aia aid aii aip ais ap- apa apd api app aps as- asa asd asi asp ass daa dad dai dap das dda ddd ddi ddp dds di- dia did dii dip dis dpa dpd dpi dpp dps dsa dsd dsi dsp dss i-d ia- iaa iad iai iap ias ida idd idi idp ids iia iid iii iip iis ipa ipd ipi ipp ips is- isa isd isi isp iss p-p paa pad pai pap pas pda pdd pdi pdp pds pia pid pii pip pis ppa ppd ppi ppp pps ps- psa psd psi psp pss saa sad sai sap sas sda sdd sdi sdp sds sia sid sii sip sis spa spd spi spp sps ss- ssa ssd ssi ssp sss