C1111233131211111211113313331333133313221211113313331333133313233313232321   >>    C111123313121111121111331333133313331322121111331333133313331323331323232   <<    C1111233131211111211113313331333133313221211113313331333133313233313232323   >>      C1111233131211111211113313331333133313221211113313331333133313233313232322   >>