---
id: 697a49e9860d24853adef67f
title: "Challenge 194: 2026 Winter Games Day 15: Freestyle Skiing"
challengeType: 29
dashedName: challenge-194
---

# --description--

Given a trick name consisting of two words, determine if it is a valid freestyle skiing trick name.

A trick is valid if the first word is in the list of valid first words, and the second word is in the list of valid second words.

- The two words will be separated by a single space.

Valid first words:

|`"Misty"`|
|-|
|`"Ghost"`|
|`"Thunder"`|
|`"Solar"`|
|`"Sky"`|
|`"Phantom"`|
|`"Frozen"`|
|`"Polar"`|

Valid second words:

|`"Twister"`|
|-|
|`"Icequake"`|
|`"Avalanche"`|
|`"Vortex"`|
|`"Snowstorm"`|
|`"Frostbite"`|
|`"Blizzard"`|
|`"Shadow"`|

# --hints--

`is_valid_trick("Polar Vortex")` should return `True`.

```js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_trick("Polar Vortex"), True)`)
}})
```

`is_valid_trick("Solar Icequake")` should return `True`.

```js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_trick("Solar Icequake"), True)`)
}})
```

`is_valid_trick("Thunder Blizzard")` should return `True`.

```js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_trick("Thunder Blizzard"), True)`)
}})
```

`is_valid_trick("Phantom Frostbite")` should return `True`.

```js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_trick("Phantom Frostbite"), True)`)
}})
```

`is_valid_trick("Ghost Avalanche")` should return `True`.

```js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_trick("Ghost Avalanche"), True)`)
}})
```

`is_valid_trick("Snowstorm Shadow")` should return `False`.

```js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_trick("Snowstorm Shadow"), False)`)
}})
```

`is_valid_trick("Solar Sky")` should return `False`.

```js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_valid_trick("Solar Sky"), False)`)
}})
```

# --seed--

## --seed-contents--

```py
def is_valid_trick(trick_name):

    return trick_name
```

# --solutions--

```py
def is_valid_trick(trick_name):
    valid_first = ["Misty", "Ghost", "Thunder", "Solar", "Sky", "Phantom", "Frozen", "Polar"]
    valid_second = ["Twister", "Icequake", "Avalanche", "Vortex", "Snowstorm", "Frostbite", "Blizzard", "Shadow"]

    words = trick_name.split(" ")
    first, second = words
    return first in valid_first and second in valid_second
```