bbbb bbeb bbet bebb bebe bebi beby beeb beep beet beey beit bete beti bett beye beyi beyt bibb bibe bibi bieb biet bipp bite bitt bpti btbp btie bttb byit byte ebby ebit eeby eeee eete eiei eitb eiti epee epi- epie epip epit eppp eppy epte etee ette etti etty eyeb eyet eyey eype eyte i-be i-by ibet ibie ibtb ibyi ieet ieie iett iiie iiii iiit iitt ipet ipie ippy itbe itby itep itet itie itty iyet iypt peep peet peip peit pepe pepi pete peti pett pety pibb pibi piep piet piip pipe pipi pipp pipy pite piti pitt pity piye ppib ppie pppp pptt ppye pyep pyet pype pypy pyte pytt tbit tbtp teet teie teip tepe tepi tepp tete teti tett teye tibi tie- tiee tiei tiep tiet tiit tip- tipe tipi tipp tipt tite titi titp titt tiye tiyi tppp tpte tptp ttbb tttt tybi tyee tyet typ- type typp typy tyte tyti tytt tyty ybet yeep yeet yeie yeii yeit yepe yepp yete yeti yett yeye yeyi yiet yipe yite yiti yitp yyyy