# no_14





Given a list of ints, return true if it contains no 1's or it contains no 4's.

```
no_14([1, 2, 3]) -> true
no_14([1, 2, 3, 4]) -> false
no_14([2, 3, 4]) -> true
```

This exercise was taken from [codingbat.com](https://codingbat.com/prob/p136648) and has been adapted for the Python language. There are many great programming exercises there, but the majority are created for Java.

## Starter Code
```python
from typing import List


def no_14(nums: List[int]) -> bool:
    pass


result = no_14([1, 2, 3])
print(result)
```

## Tests
```python
from main import no_14


def test_no_14_1():
    assert no_14([1, 2, 3]) == True


def test_no_14_2():
    assert no_14([1, 2, 3, 4]) == False


def test_no_14_3():
    assert no_14([2, 3, 4]) == True


def test_no_14_4():
    assert no_14([1, 1, 4, 4]) == False


def test_no_14_5():
    assert no_14([2, 2, 4, 4]) == True


def test_no_14_6():
    assert no_14([2, 3, 4, 1]) == False


def test_no_14_7():
    assert no_14([2, 1, 1]) == True


def test_no_14_8():
    assert no_14([1, 4]) == False


def test_no_14_9():
    assert no_14([2]) == True


def test_no_14_10():
    assert no_14([2, 1]) == True


def test_no_14_11():
    assert no_14([1]) == True


def test_no_14_12():
    assert no_14([4]) == True


def test_no_14_13():
    assert no_14([]) == True


def test_no_14_14():
    assert no_14([1, 1, 1, 1]) == True


def test_no_14_15():
    assert no_14([9, 4, 4, 1]) == False


def test_no_14_16():
    assert no_14([4, 2, 3, 1]) == False


def test_no_14_17():
    assert no_14([4, 2, 3, 5]) == True


def test_no_14_18():
    assert no_14([4, 4, 2]) == True


def test_no_14_19():
    assert no_14([1, 4, 4]) == False
```