<s>[INST] Here's a problem: Write a function that takes a list of integers and returns the sum of the first two elements. If the list has less than two elements, the function should raise a ValueError.

Here's an example:
```
# Test case 1
numbers = [3, 4, 5, 6]
result = first_two_sum(numbers)
print(result)  # Output: 7

# Test case 2
numbers = []
result = first_two_sum(numbers)
print(result)  # This should raise a ValueError
```
How can I write a function to solve this problem?[/INST]