C11112331312111112111133133313231333133313221213113313231322121   >>    C1111233131211111211113313331323133313331322121311331323132212   <<    C11112331312111112111133133313231333133313221213113313231322123   >>      C11112331312111112111133133313231333133313221213113313231322122   >>