Dear Jadi,
I am expressing my appreciation for the code you wrote.

The code you gave was well-structured and showed your proficiency. Your efforts to create a simple and effective solution to the problem did not go unnoticed.

Upon reviewing your code, I was impressed with how you populated the 'answer' array based on the keys. It was a concise and memory-efficient approach that delivered the desired output accurately.

Your code inspired me to explore alternative solutions to the same problem. I took a different approach to the task and thought it might be beneficial to share it with you. Here is my code:

s = "T4 l16 _36 510 _27 s26 _11 320 414 {6 }39 C2 T0 m28 317 y35 d31 F1 m22 g19 d38 z34 423 l15 329 c12 ;37 19 h13 _30 F5 t7 C3 325 z33 _21 h8 n18 132 k24"

s_sorted = []

for l in s.split(" "):
    s_sorted.append([
        l[0],
        int(l[1:])
    ])

s_sorted.sort(key=lambda x: x[1])

key = ""

for l in s_sorted:
    key += l[0]

print("Sorted List:", s_sorted)
print("Resulting Key:", key)

breakdown

In this code, I focused on sorting the elements in the keys based on the numeric values following the first character. I used a list called s_sorted to store each element's first character and corresponding numeric value.

After extracting and sorting the elements using a lambda function as the sorting key, I created the key string, which contains the characters from the sorted elements. This ensured that the 'key' line represents the correct order of the features based on the numeric values.

Your code inspired me to make my solution more efficient and capable of handling more extensive input while maintaining simplicity and readability.

If you have any feedback or suggestions about my alternative approach, I'd be glad to hear them from you.

I am looking forward to more coding discussions and sharing ideas in the future.

Best regards,
Alex