C1111133313331323223313331333133313331323323133112111133121123311   >>    C111113331333132322331333133313331333132332313311211113312112331   <<    C1111133313331323223313331333133313331323323133112111133121123313   >>      C1111133313331323223313331333133313331323323133112111133121123312   >>