C11111211113313112113313331333133313331312322121111331333132233132332211   >>    C1111121111331311211331333133313331333131232212111133133313223313233221   <<    C11111211113313112113313331333133313331312322121111331333132233132332213   >>      C11111211113313112113313331333133313331312322121111331333132233132332212   >>