C11112331312111112111133133313231333132313331333221333132313221211   >>    C1111233131211111211113313331323133313231333133322133313231322121   <<    C11112331312111112111133133313231333132313331333221333132313221213   >>      C11112331312111112111133133313231333132313331333221333132313221212   >>