C11112331333132311331333133313331312111113311212111133132311211331313233313211   >>    C1111233133313231133133313331333131211111331121211113313231121133131323331321   <<    C11112331333132311331333133313331312111113311212111133132311211331313233313213   >>      C11112331333132311331333133313331312111113311212111133132311211331313233313212   >>