import java.math.BigDecimal;
import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
 
        BigDecimal sum, num, num1;
 
        int n;
 
        Scanner sc = new Scanner(System.in);
 
        n = sc.nextInt();
 
        for (int i = 1; i <= n; i++) {
 
            sum = new BigDecimal("0");
 
            String s, s1, ans;
 
            s = sc.next();
 
            s1 = sc.next();
 
            num = new BigDecimal(s);
 
            num1 = new BigDecimal(s1);
 
            sum = sum.add(num);
 
            sum = sum.add(num1);
 
            sum = sum.stripTrailingZeros();
 
            ans = sum.toPlainString();
 
            int len = ans.length();
 
            boolean tag = false;
 
            for (int j = 0; j < len; j++) {
 
                if (ans.charAt(j) == '.') {
 
                    tag = true;
 
                    break;
                }
            }
 
            if (tag) {
 
                System.out.println(sum.stripTrailingZeros());
 
            } else {
 
                System.out.print(ans);
 
                System.out.println(".0");
 
            }
        }
    }
}