# Test

# Case 0

```test
> 0
true
```

# Case 1

```test
> 1
false
```

# Test 1

```test
> 7
true
```

# Test 2

```test
> 18
false
```

# Test 3

```test
> 344
false
```

# Test 4

```test
> 823543
true
```