iiii iiit iitr iitt init inni innr inp- inpi inpp inpt inri inti intn intp intr ipin ippr ipri iri- irin irip irri irti irtp itin itri n-ii niip niir niit nini nipr nipt nirt niti nitr nnit nnnn nnpi nnpr nntn npin npri nprt nptn nrpn nttr piip pini pinn pinp pint pipi pipp piri pirn pirr piti pitr pitt pnin pnpp pntr pppn pppp pptn pptt pri- prii prin prnp prri prti prtp prtr riin rinn ripi ripp ripr ript riri riti ritt rnin rnnt rntp rpii rppn rptn rrrr rttp tiit tini tinn tint tip- tipi tipp tipt tiri tirr titi titp titt tpir tppp tppr tptp tptr tri- trin trip trit trpn trpp trtr tttt