static int findMissingNumber(int start, int end, List<Integer> list) {
		 List<Integer> list0 = new ArrayList<>();   
		 int found = 0;
		 for (int i = start; i <= end; i++) {  
		      list0.add(i);  
		  }   
		 for (Integer integer : list0) {   
		    if (!list.contains(integer)){ 
		          found = integer;      
		     }  
		  }  
		return found;
		
	}
}