def rearrange_word(word):
    length = len(word)
    if length % 3 != 0:
        return "TANTRUM"
 
    section_length = length // 3
    first_section = word[:section_length][::-1]
    middle_section = word[section_length:2*section_length]
    third_section = word[2*section_length:][::-1]
 
    return first_section + middle_section + third_section
 
# Example usage
print(rearrange_word("racecar"))  # Output: carerat
print(rearrange_word("bounce"))   # Output: TANTRUM
# your code goes here

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