dddd ddps ddss didi dids diii diis dipp dips dird dirr dirs dis- disd disi disp diss dpsd drip drrs drsp dsdp dsdr dsip dsps dsri dsrp dsrr dssi dssp idid idir idis idps idss iiii iiis iirs iisd iisi iisp iisr ipdi ipid ippr ipri ipsi ipsp ipss irdp irds iri- irid irip iris irps irri irrs irsp isds isis ispr isps isri isrp issi issp issr isss pdpr pdrs pdsd pdss pids piip pipi pipp pips piri pirr pirs pisd pisi piss ppds ppid pppd pppp ppps ppss pri- prid prii pris prpd prps prrd prri prrs prsd prsi prss psdi psdp psdr psds psid psip psis pspi pspp pspr psps psrd psrp ridd ridi rids riis ripd ripi ripp ripr rips riri rirs risd risi risp riss rpdp rpii rpps rrrr rrsp rsdd rsds rsid rsis rsps s-ii sdds sdpr sdps sdrs sdss sidd sidi sidr sids sipi sipp sips siri sirp sirr sirs sisd sisi siss spdp spdr spip spir spis sppd spps sprd spri sprs spsd spsp spss sris srps srsd srsp ssdd ssdp ssid ssis ssps ssri ssrs sssi ssss