function sumOfTwo(nums1, nums2, value){
  //write code here
  const map = {}
  for(let num of nums1){
    const difference = value - num;
    map[difference] = difference
  }
  for(let num of nums2){
    if(map.hasOwnProperty(num)){
      return true
    }
  }
    return false
}



/**
* Test Suite 
*/
describe('sumOfTwo()', () => {
    it('returns true if a value can be found that by adding one number from each list', () => {
        // arrange
        const nums1 = [1, 2, 3];
        const nums2 = [10, 20, 30, 40];
        const value = 42;
        
        // act
        const result = sumOfTwo(nums1, nums2, value);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(true);
    });
});