C11112331312111112111133133313331333132313233313231323133313232212231   >>    C1111233131211111211113313331333133313231323331323132313331323221223   <<    C11112331312111112111133133313331333132313233313231323133313232212233   >>      C11112331312111112111133133313331333132313233313231323133313232212232   >>