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Write a Python function `find_char_long` that takes a string as input and returns a list of all words in the string that are at least 4 characters long. Words are defined as sequences of alphanumeric characters separated by spaces or punctuation.
#### Example Usage
```python [main.nopy]
find_char_long("Please move back to stream")
# Output: ['Please', 'move', 'back', 'stream']
find_char_long("Jing Eco and Tech")
# Output: ['Jing', 'Tech']
find_char_long("Jhingai wulu road Zone 3")
# Output: ['Jhingai', 'wulu', 'road', 'Zone']
```import re
def find_char_long(text):
"""
Find all words in the input string that are at least 4 characters long.
Args:
text (str): The input string.
Returns:
list: A list of words that are at least 4 characters long.
"""
# Use a regular expression to find words of at least 4 characters.
pass # Replace this with your implementation