dddd ddps ddss ddts dlst dntp dntt dpdt dpll dpls dpsd dpst dpts dsdp dsls dsps dspt dssn dssp dsst dstn dsts dtdp dtpl dtss dttp lddp ldls lldp llds llll llps lndn lnts lpns lppl lpss lsds lspl lssp lsts ltds ltns ltnt ltps ltsp ndls ndnp ndnt ndpd ndps ndsl ndss nlls nlsp nnls nnnn nnsl nnss nntn nppd nppl npsl npss nptn nsdl nsds nsdt nslp nsls nsps nssp nsss nstd nstl nstp nsts ntds ntnd ntpd ntss pdns pdpn pdsd pdss pldn pldt plnt plpp plss pltt pnld pnln pnnl pnpp pntd pntl ppds pppd pppn pppp ppps ppss pptn ppts pptt psdp psds pspp psps psst psts ptld ptpd ptsd sdds sdls sdlt sdps sdsl sdss slds slln sllp slpp slps slst slts snns snpp snsd spdl spdp spdt splp spls spns sppd spps spsd spsp spss spst spts ssdd ssdp sslp sslt ssns sspl ssps sspt ssss sstd sstl sstp ssts stds stld stln stlt stnd stnn stns stpd stpp stps stss sttd tdls tdss tldp tndd tnsp tnts tpld tpls tppd tppp tptp tspn tsps tspt tsst tsts ttss tttt