C11112331333132311331333133313331333132313231133131133132311211   >>    C1111233133313231133133313331333133313231323113313113313231121   <<    C11112331333132311331333133313331333132313231133131133132311213   >>      C11112331333132311331333133313331333132313231133131133132311212   >>