C11111333133313232233133313331333131133131211113313123313233221   >>    C1111133313331323223313331333133313113313121111331312331323322   <<    C11111333133313232233133313331333131133131211113313123313233223   >>      C11111333133313232233133313331333131133131211113313123313233222   >>