C11112331312111112111133133313231333132313232233133313233222313221   >>    C1111233131211111211113313331323133313231323223313331323322231322   <<    C11112331312111112111133133313231333132313232233133313233222313223   >>      C11112331312111112111133133313231333132313232233133313233222313222   >>