Dropped some of SYSTEM's objects

Hi, one junior DBA dropped by mistake some of SYSTEM's objects.  He generated a DROP.... script, and ran it thinking he was connected as some other user.  When he realized he was dropping the wrong objects, he canceled the execution.  Here´s a list of what the script did:

select decode(object_type,'TABLE','drop '||object_type||' "'||object_name||'" cascade constraints;','drop '||object_type||' "'||object_name||'";')

  from user_objects where object_type in ('TABLE','SEQUENCE','PACKAGE','PROCEDURE','FUNCTION','VIEW','SYNONYM','MATERIALIZED VIEW')

order by object_Type, object_name

/

drop FUNCTION "LOGMNR$COL_GG_TABF_PUBLIC";