C11112331312111112111133133313231333132313232233133313232211313231   >>    C1111233131211111211113313331323133313231323223313331323221131323   <<    C11112331312111112111133133313231333132313232233133313232211313233   >>      C11112331312111112111133133313231333132313232233133313232211313232   >>