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Write a function `group_tuples` that takes a list of tuples as input and groups the tuples by their first element. The function should return a list of tuples where each tuple contains the first element followed by all the unique second elements grouped together.
#### Example Usage
```python [main.nopy]
print(group_tuples([('x', 'y'), ('x', 'z'), ('w', 't')]))
# Output: [('x', 'y', 'z'), ('w', 't')]
print(group_tuples([('a', 'b'), ('a', 'c'), ('d', 'e')]))
# Output: [('a', 'b', 'c'), ('d', 'e')]
print(group_tuples([('f', 'g'), ('f', 'g'), ('h', 'i')]))
# Output: [('f', 'g'), ('h', 'i')]
```
#### Constraints
- The input list will contain tuples of at least two elements.
- The first element of each tuple will be a string.
- The second elements will also be strings.
- The order of the grouped tuples in the output should follow the order of their first appearance in the input list.def group_tuples(input_list):
"""
Groups tuples by their first element and combines the second elements.
Args:
input_list (list): A list of tuples to be grouped.
Returns:
list: A list of grouped tuples.
"""
# Initialize a dictionary to store grouped elements
grouped = {}
# Iterate through the input list
for item in input_list:
# Placeholder for processing logic
pass
# Convert the dictionary to a list of tuples
result = []
return result