C1111233131211111211113313331333133313331312331333133322121111331111   >>    C111123313121111121111331333133313331333131233133313332212111133111   <<    C1111233131211111211113313331333133313331312331333133322121111331113   >>      C1111233131211111211113313331333133313331312331333133322121111331112   >>