DECLARE  
  TYPE triplet IS VARRAY(3) OF VARCHAR2(15);  
  TYPE trio    IS VARRAY(3) OF VARCHAR2(15);  
  
  group1 triplet := triplet('Jones', 'Wong', 'Marceau');  
  group2 triplet;  
  group3 trio;  
BEGIN  
  group2 := group1;  -- succeeds  
  group3 := group1;  -- fails  
END;