code: function disambiguateRule3(word){
  		// Rule 3 : berCAerV -> ber-CAerV where C != 'r'
  		var matches = word.match(/ber([bcdfghjklmnpqrstvwxyz])([a-z])er([aiueo])(.*)/);
  	    if(matches){
  	    	if(matches[1] == "r"){
  	    		return
  	    	}
  	        return matches[1] + matches[2] + "er" + matches[3] + matches[4];
  	    }
  	}
docs: RULE 3