KOU
OUGUO
UGUOU
GUOUG
UOUGU
OUGUO
UGUOI
GUOIR
UOI
IRGGO
RGGOR
GGORO
GOROO
ROOUR
OOURY
OURYI
URYIG
RYIGR
YIGRI
IGRIU
GRIUO
RIUOK
KOUGUOUGUOIRGGOROOURYIGRIUOK
Given this the most likely string for Arabian nights is as follows.
KOU
OUGUO
UGUOU
GUOUG
UOUGU
OUGUO
UGUOU
GUOUG
UOUGU
OUGUO
UGUOI
GUOIR
UOI
IRGGO
RGGOR
GGORO
GOROO
ROOUR
OOURY
OURYI
URYIG
RYIGR
YIGRI
IGRIU
GRIUO
RIUOK
KOUGUOUGUOUGUOIRGGOROOURYIGRIUOK