import random


def return_random_from_word(word):
    """
    This function receives a TextMobject, 
    obtains its length: 
        len(TextMobject("Some text"))
    and returns a random list, example:

    INPUT: word = TextMobjecT("Hello")
    length = len(word) # 4
    rango = list(range(length)) # [0,1,2,3]

    OUTPUT: [3,0,2,1] # Random list
    """
    rango = list(range(len(word)))
    random.shuffle(rango)
    return rango