C11111333133313232233133313331333131123313233313231333132312312121   >>    C1111133313331323223313331333133313112331323331323133313231231212   <<    C11111333133313232233133313331333131123313233313231333132312312123   >>      C11111333133313232233133313331333131123313233313231333132312312122   >>