What's wrong in my code?

package com.codegym.task.task05.task0529;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/*
Console-based piggy bank

*/

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        int sum = 0;

        while (1 == 1) {
            String newNum = reader.readLine();
            sum = (Integer.parseInt(newNum)) + sum;
            if (reader.readLine().equals("sum")) {
                break;
            }
        }
        System.out.println(sum);
    }
}