C11112331312111112111133133313231333132313331333132313311211113313232211   >>    C1111233131211111211113313331323133313231333133313231331121111331323221   <<    C11112331312111112111133133313231333132313331333132313311211113313232213   >>      C11112331312111112111133133313231333132313331333132313311211113313232212   >>