import java.util.*; 

class One {
  public static void main(String[] args) {

    Scanner a = new Scanner(System.in); 
 
    System.out.print("prompt> "); 

    String line = a.nextLine(); 

    int sum = 0; 

    while (! line.equals("finished") ) {

      try {
        sum = sum + Integer.parseInt(line);  
        System.out.println("sum becomes: " + sum); 
      } catch (Exception e) {
        System.out.println(line + " not a number, sum is unchanged: " + sum); 
      } 

      System.out.print("prompt> "); 

      line = a.nextLine();        

    } 

    System.out.println ( sum ); 
  } 

}