C11112331312111112111133133313231333132322121111133313231322131   >>    C1111233131211111211113313331323133313232212111113331323132213   <<    C11112331312111112111133133313231333132322121111133313231322133   >>      C11112331312111112111133133313231333132322121111133313231322132   >>