C11112331333132311331333133313331323133313331333131133132233121   >>    C1111233133313231133133313331333132313331333133313113313223312   <<    C11112331333132311331333133313331323133313331333131133132233123   >>      C11112331333132311331333133313331323133313331333131133132233122   >>