C11112331312111112111133133313231333132313232233133313113313111323211311   >>    C1111233131211111211113313331323133313231323223313331311331311132321131   <<    C11112331312111112111133133313231333132313232233133313113313111323211313   >>      C11112331312111112111133133313231333132313232233133313113313111323211312   >>