code: public AsymmMultiPos<S, String, String> betn(String left, String right) {
  		return new AsymmMultiPos<S, String, String>(left, right) {
  
  			@Override protected S result() {
  				if (Strs.isEmpty(asymmLR)) {
  					return aQueue('S', left, right, pos, position, inclusive, plusminus, filltgt);
  				} else { return aQueue('Z', left, right, pos, asymmLR, inclusive, plusminus, filltgt); }
  			}
  		};
  	}
docs: Sets the substrings in given left tag and right tag as the search string
  
  @see Betner#between(String, String)
  @param leftSameWithRight
  @return