C1111233131211111211113313331333133313331311211331333133313331323132223121   >>    C111123313121111121111331333133313331333131121133133313331333132313222312   <<    C1111233131211111211113313331333133313331311211331333133313331323132223123   >>      C1111233131211111211113313331333133313331311211331333133313331323132223122   >>