ddd dde ddi ddp dds de- ded dee dei dep des di- did die dii dip dis dpd dpe dpi dpp dps dsd dse dsi dsp dss ed- edd ede edi edp eds eed eee eep ees eid eie eii eip eis ep- epd epe epi epp eps es- esd ese esi esp ess i-d idd ide idi idp ids ie- ied iee iei iep ies iid iie iii iip iis ipd ipe ipi ipp ips is- isd ise isi isp iss p-p pdd pde pdi pdp pds ped pee pei pep pes pid pie pii pip pis ppd ppe ppi ppp pps ps- psd pse psi psp pss sdd sde sdi sdp sds se- sed see sei sep ses sid sie sii sip sis spd spe spi spp sps ss- ssd sse ssi ssp sss