ddd ddi ddr dds ddu di- did dii dir dis diu drd dri drr drs dru dsd dsi dsr dss dsu dud dui dur dus i-d idd idi idr ids idu iid iii iir iis iiu ir- ird iri irr irs iru is- isd isi isr iss isu iu- iud iui iur ius rdd rdi rdr rds rdu rid rii rir ris rrd rri rrr rrs rru rsd rsi rsr rss rsu rud rui rur rus ruu sdd sdi sdr sds sdu sid sii sir sis siu sr- srd sri srr srs ss- ssd ssi ssr sss ssu sud sui sur sus suu udd udi udr uds udu uid uii uir uis uiu ur- urd uri urr urs uru usd usi usr uss usu uur uus uuu