i-pin iiiii iitti inini inipi innit innti intpr ipini ipiti irinn irpin irrit itrip ittti n-p-n niiip ninti nipin nipit nipri nirit nitin nitr- nitti ntini p-n-p piiri pinin pinit pinn- pinni pipit pippi pipri pirin pirni pirri pitin pitip pitri pitti pptnt priit print priti pritt prntr ptprn ptprr ptprt rintt ripit ti-ti tipin tipit tippi tirit titii titin titpn titti tntnt triin triip trini tripi tripp tript trit- tritn tritt trpin ttttt