import java.util.*;

public class Main{
  public static void main(String args[]) {
    Scanner in = new Scanner(System.in);
    Pair biggestPair = null;
    boolean done = false;
    int count = 0, biggestSum = Integer.MIN_VALUE;

    while (!done) {
      System.out.println("Please enter two numbers (on two different lines)");
      Pair current = new Pair(in.nextInt(), in.nextInt());

      if (current.getLeft()%2 == 0 && current.getRight()%2 != 0) {
        count++;
        int currentSum = current.getLeft() + current.getRight();

        if (currentSum > biggestSum) {
          biggestSum = currentSum;
          biggestPair = current;
        }
      } else if (current.getLeft()%2 != 0 && current.getRight()%2 == 0) {
        done = true;
      }
    }

    if (biggestPair != null) {
      System.out.println("The pair with the greatest sum is: " + biggestPair + ". Their sum is: " + biggestSum + ".");
      System.out.println("The number of valid pairs: " + count + ".");
    } else {
      System.out.println("There is no valid pair");
    }
  }
}

class Pair {
  private int Left, Right;

  public Pair(int Left, int Right) {
    this.Left = Left;
    this.Right = Right;
  }

  public int getLeft() {
    return Left;
  }

  public int getRight() {
    return Right;
  }

  public String toString() {
    return String.format("Pair [Left=%d, Right=%d]", Left, Right);
  }
}