C11112331333132311331333132313331333131133131133133313332233131232211   >>    C1111233133313231133133313231333133313113313113313331333223313123221   <<    C11112331333132311331333132313331333131133131133133313332233131232213   >>      C11112331333132311331333132313331333131133131133133313332233131232212   >>