C111112111133131121133133313331333133313331323133313331323133313233231221   >>    C11111211113313112113313331333133313331333132313331333132313331323323122   <<    C111112111133131121133133313331333133313331323133313331323133313233231223   >>      C111112111133131121133133313331333133313331323133313331323133313233231222   >>