iiii iiit iitr iitt iiwi ippr ipri iri- irip irri irti irtp itri iwiw iwpr piip pipi pipp piri pirr piti pitr pitt piwi pppp pptt pri- prii prri prti prtp prtr ripi ripp ripr ript riri riti ritt rpii rrrr rttp tiit tip- tipi tipp tipt tiri tirr titi titp titt tiwi tpir tppp tppr tprw tptp tptr tri- trip trit trpp trtr tttt twi- twip twit twrp wiii wiit wipi wipp wipr wipt wiri wirr wirt witi witr witt wiwi wpip wpir wpit wppi wppr wppt wprp wprr wprt wpti wptr wptw wpwt wrip writ wrpi wrpp wrpr wrpw wrrw wrti wrtp wrtr wrtw wrwr wtip wtpi wtpr wtpt wtri wtrp wtrt wtrw wtti wttr wttt wttw wtwr wtwt wtww wwii wwip wwpr wwpt wwpw wwrr wwrw wwti wwtp wwtr wwtw wwwi wwwr wwww