ddd ddl dds ddt dl- dld dll dls dlt dlv dsd dsl dss dst dsv dtd dtl dts dtt dtv dvd dvl dvs dvt ldd ldl lds ldt ldv lld lll lls llt llv lsd lsl lss lst lsv ltd ltl lts ltt ltv lvd lvl lvs lvt lvv sdd sdl sds sdt sdv sld sll sls slt slv ss- ssd ssl sss sst ssv std stl sts stt stv svd svl svs svt svv tdd tdl tds tdt tdv tld tll tls tlt tlv tsd tsl tss tst tsv ttd ttl tts ttt ttv tvd tvl tvs tvt vdd vdl vds vdt vdv vl- vld vll vls vlt vlv vsd vsl vss vst vsv vtl vts vtt vtv vvs vvt vvv