Actually... 
 The data looks a bit more like this; 
 AA=value1,BB=value2,CC=value3,BB=value4,BB=value5  
AA=value6,BB=value7,BB=value8  
AA=value9,BB=value10,CC=value11  
AA=value12,BB=value13,CC=value14,BB=value15,CC=value16 
 There are other fields (CC) that I am not interested in that are mixed up with the BB fields. There is always only one AA field per event. Each BB field may have an associated CC field. 
 I am only interested in the BB fields per AA 
						
					
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