static int findMissingNumber(int start, int end, List<Integer> list) {
		List<Integer> list1= List.of(10,11,12,13,14,15,16,17,18,19,20);


		
		for(Integer n:list1) {
			int j=0;
			for(Integer m:list) {
				if (n==m) {
					break;
				}
				else {
					j++;
				}
				if (j==list.size()) {
					return n;
				}
				
				
			}
		}
		return 0;
	}