C111123313331323113313331323133313331311331311331333133112111133132211213131   >>    C11112331333132311331333132313331333131133131133133313311211113313221121313   <<    C111123313331323113313331323133313331311331311331333133112111133132211213133   >>      C111123313331323113313331323133313331311331311331333133112111133132211213132   >>