private void go(){
		int[] p = new int[N];
		for(int i=2;i<N;i++) p[i]=1;
		sieve(p);
		int count =0;
		int sum=0;
		for(int i=10;i<N;i++){
			if(p[i] == 1 && trunLeft(i, p) && trunRight(i, p)){
				count++;
				sum+=i;
				System.out.println(i);
			}
			if(count>=11) break;
		}
		System.out.println(sum);
	}