C11112331312111112111133133313331333132311211331323133313331333232212121   >>    C1111233131211111211113313331333133313231121133132313331333133323221212   <<    C11112331312111112111133133313331333132311211331323133313331333232212123   >>      C11112331312111112111133133313331333132311211331323133313331333232212122   >>