N. -3
   
                                                               
                                            
                                                       28.12.89 N. 241
   
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               +---------       +-----+----+------       +----      
   +------------+---------+-------+-----+----+------+-------+----+------
   +------------+---------+-------+-----+----+------+-------+----+------
   +--------------------------------------------------------------------+
   
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