C11111333133313232233133313331333133313331312111133133321133121   >>    C1111133313331323223313331333133313331333131211113313332113312   <<    C11111333133313232233133313331333133313331312111133133321133123   >>      C11111333133313232233133313331333133313331312111133133321133122   >>