XE XB IC IB IA
= 1 lower bed & 1 upper bed / 
= 2 lower beds & 2 upper beds / 
= 2 lower beds & 1 upper bed / 
= 2 lower beds & 1 upper bed & sofa / 
= cabins with bathtub / 
= cabins with porthole(s) / 
= 2 lower beds
XE XB IC IB IA
= 1 lower bed & 1 upper bed / = 2 lower beds & 2 upper beds / = 2 lower beds & 1 upper bed / = 2 lower beds & 1 upper bed & sofa / = cabins with bathtub / = cabins with porthole(s) / = 2 lower beds