C11112331333132311331333132313331333131133131133133313311211111223312111   >>    C1111233133313231133133313231333133313113313113313331331121111122331211   <<    C11112331333132311331333132313331333131133131133133313311211111223312113   >>      C11112331333132311331333132313331333131133131133133313311211111223312112   >>