if(exists($matrixhash{$key})){
			
			print "Key exists ! \n";
			<STDIN>;
			
			}else{
			#it doesn't
			print "$key stored as a key here\n";
			# ADD KEY AND VALUE TO HASH
			
			push(@{$matrixhash{$key}},$store);
			
			print "key is $key and value is @{$matrixhash{$key}}\n";
			#<STDIN>;
			}