-ing dddd didi digg digi diii din- ding dini dinn dipn dipp dird dirr dpin dpni dprg drin drip gggg ggrn gidd gidi gigg gigi gign ging gini ginn gipi gipp gird girg giri girn girr gnin gnip gnrr gpgp gpip gprd gprp grid grig grin grip grni grrr idid idig idin idir igni igri iiii ind- indi inid inig inni innr inp- inpi inpp inri ipdi ipid ipin ippr ipri irdp iri- irid irig irin irip irri n-ii ndnp ndpd ndpr ndri ngri nidd nidi nigg niip niir nind ning nini nipr nngn nnnn nnpi nnpr npin nppd npri nrpn nrrd pdpn pdpr pgdn pigg pign pigp piip pind ping pini pinn pinp pipi pipp pirg piri pirn pirr pnin pnpp ppgi ppid ppig pppd pppn pppp pri- prid prig prii prin prnd prnp prpd prrd prri ridd ridi rigg rigi riin rind ring rinn ripd ripi ripp ripr riri rndp rnin rpdp rpii rppn rrrr