C1111233131211111211113313331333133313331333131211111333133313331323132321221   >>    C111123313121111121111331333133313331333133313121111133313331333132313232122   <<    C1111233131211111211113313331333133313331333131211111333133313331323132321223   >>      C1111233131211111211113313331333133313331333131211111333133313331323132321222   >>