OXYPROLINE

el en er ex in li lo ne no oe oi on op or ox oy pe pi re xi ye yo

eon ern ion ire lei lex ley lie lin lip loo lop lox lye nil nip nix noo nor oil ole one ono ope ore oxo oxy pen per pie pin pix ply poi pol poo pox pro pry pye pyx rei rep rex rin rip roe rye yen yep yin yip yon

enol exon expo ilex inly inro iron leno lien lier line lino liny lion lipe lire loin lone loon loop lope lore lorn lory lynx lyre nixe nixy noel noil noir nolo nope nori oily oleo olio only onyx open orle oryx oxen oyer pein peon peri pier pile pily pine piny pion pirn pixy plex plie ploy pole polo poly pone pony pool poon poor pore porn poxy prex prey pyin pyre pyro rein rely repo riel rile ripe roil role rope ropy yelp yipe yoni yore