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MultiMap

 
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Hello all,
Iam using multimap because it can take for a given key multiple values
my question is how can i read that map so that i will get for a given key all values for ex:
key value
aa /bb/cc
aa /vv/ff
aa /ff/hh
But when i read them i require it should display
key value
aa /bb/cc
/vv/ff
/ff/hh without the repetion of key.How to do this.
 
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