marks              []int
	marker_to_input    map[int][]string
	marker_to_expected map[int][]string
	marker_to_output   map[int][]string
}

const marker_start = 1234

func parseTestData(t *testing.T) *ParsedTestData {
	r := &ParsedTestData{}
	scanner := bufio.NewScanner(strings.NewReader(testdata))
	r.marker_to_input = make(map[int][]string)
	r.marker_to_expected = make(map[int][]string)
	marker := marker_start