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 nitz nnit nnnn nnpi nnpr nntn npin npri nprt nptn nrpn nttr nzpi nzpp piip pini pinn pinp pint pipi pipp piri pirn pirr piti pitr pitt pitz pnin pnpp pntr pppn pppp pptn pptt pri- prii prin prnp prri prti prtp prtr riin rinn ripi ripp ripr ript riri riti ritt ritz rizi rizz rnin rnnt rntp rpii rppn rptn rrrr rttp rzip tiit tini tinn tint tip- tipi tipp tipt tiri tirr titi titp titt titz tizi tizz tpir tppp tppr tptp tptr tri- trin trip trit triz trpn trpp trtr tttt tzzt ziip zinn zipp ziri zirp ziti zizi zizz zrin zrtp zzzz