return fmt.Errorf("%d should be %d", got, want)

		return fmt.Errorf("Test1: %d should be %d", got, want)
	}
	return nil
}
func Test2(input string) error {
	var ret []string
	input = strings.TrimSpace(input)
	for _, line := range strings.Split(input, "\n") {
		ret = append(ret, strings.TrimSpace(line))

	want := 5
	got, err := countThreeIncrease(ret)
	if err != nil {
		return err
	}
	if want != got {
		return fmt.Errorf("Test2: %d should be %d", got, want)
	}

	if err := Test2(test1); err != nil {
		return err
	}

	// parse input.txt

	// answer first part

	// answer second part
	count3, err := countThreeIncrease(data)
	if err != nil {
		return err
	}
	log.Println("3 increase count:", count3)

func countThreeIncrease(data []string) (int, error) {
	var inc int
	for i := range data {
		if i >= 3 {
			// log.Println(sum(data, i-1), sum(data, i))
			if sum(data, i-1) < sum(data, i) {
				inc++
			}
		}
	}
	return inc, nil
}
func sum(data []string, k int) int {
	var ret int
	for i := k - 2; i <= k; i++ {
		curr, err := strconv.Atoi(data[i])
		if err != nil {
			log.Println(err)
		}
		ret += curr
	}
	return ret
}