kg86

from __future__ import print_function

import os
import subprocess

def main():
  cmd = 'git pull'
  dir = os.getcwd()
  for subdir in os.listdir(dir):
    if os.path.isdir(subdir) and os.path.exists(subdir):

kg86

class ColorfulChocolates {
public:
  int maximumSpread(string chocolates, int maxSwaps) {
    int n = chocolates.size();
    int ms[26][n];
    int i, j, k;
    for(i = 0; i < 26; i++){
      for(j = 0; j < n; j++){
        ms[i][j] = 0;
      }

kg86

class RotatingBot {
public:
  int minArea(vector <int> moves) {
    int MAX_W = 55;
    int MAX_H = 55;
    int newmap[MAX_H*2][MAX_W*2];
    vector< vector<int> > map(MAX_H*2);
    int i,j;
    for(i = 0; i < MAX_H*2; i++){
      map[i] = vector<int>(MAX_H*2);

kg86

class EasyConversionMachine {
public:
  string isItPossible(string originalWord, string finalWord, int k) {
    string POSSIBLE = "POSSIBLE";
    string INPOSSIBLE = "IMPOSSIBLE";
    int n = originalWord.size();
    int i;
    int diff=0;
    for(i = 0; i < n; i++){

kg86

class BallAndHats
{
public:
  int getHat(string hats, int numSwaps)
    {
      int idx = hats.find("o");
      if (numSwaps == 0) return idx;
      return (idx + (numSwaps % 2)) % 2;
    }
};

kg86

#! -*- coding: utf-8-unix -*-
import sys

def overlap(p1, p2):
  # print p1, p2,(p1[0]-p2[0]) ** 2 + (p1[1] - p2[1])**2
  return (p1[0]-p2[0]) ** 2 + (p1[1] - p2[1])**2 <= 4

if __name__=='__main__':
  lines = [x.strip() for x in sys.stdin.readlines() if x != '' and x != '\n']
  # print lines

kg86

#! -*- coding: utf-8-unix -*-
import sys

if __name__=='__main__':
  lines = [x.strip() for x in sys.stdin.readlines() if x != '' and x != '\n']
  for line in lines:
    cs = line.split()
    stack = []
    res = 0.0
    for c in cs:

kg86

#! -*- coding: utf-8-unix -*-
import math

if __name__=='__main__':
  n = int(raw_input())
  for i in xrange(n):
    x1, y1, x2, y2, x3, y3, x4, y4 = map(float, raw_input().strip().split(' '))
    if math.fabs((y2 - y1) * (x4 - x3) - (y4 - y3) * (x2 - x1)) < 1e-10:
      print 'YES'
    else:

kg86

#! -*- coding: utf-8-unix -*-
import math

if __name__=='__main__':
  n = int(raw_input())
  for i in xrange(n):
    x1, y1, x2, y2, x3, y3, x4, y4 = map(float, raw_input().strip().split(' '))
    if math.fabs((y2 - y1) * (x4 - x3) - (y4 - y3) * (x2 - x1)) < 1e-10:
      print 'YES'
    else:

kg86

import sys

if __name__=='__main__':
  lines = [int(x.strip()) for x in sys.stdin.readlines() if x != '' and x != '\n']
  n = lines[0]
for i in xrange(n):
  # a, b  = int(lines[i+1]), int(lines[i+2])
  a, b  = lines[2*i+1], lines[2*i+2]
  if len(str(a+b)) > 80:
    print 'overflow'