notEqual = append(notEqual, strconv.Itoa(i))
	}
	notEqual[size-1] = "z"

	for n := 0; n < b.N; n++ {
		EqualUnordered(l, equal)
		EqualUnordered(l, notEqual)
	}
}

func TestFilterDuplicates(t *testing.T) {
	tests := []struct {
		name string
		in   []string
		out  []string
	}{
		{
			name: "empty",
			in:   nil,
			out:  nil,
		},
		{
			name: "one",