
    Create a function that standardizes student variable identifiers in the automated grading system by converting snake_case formatted strings (where words are separated by underscores) to camelCase format (where words after the first are capitalized with no separators). The function should take a snake_case string used in student submissions and return its camelCase equivalent while maintaining the original meaning and structure of the identifier.
    

    
import re

def snake_to_camel(word):
    """
    Create a function that standardizes student variable identifiers in the automated grading system by converting snake_case formatted strings (where words are separated by underscores) to camelCase format (where words after the first are capitalized with no separators). The function should take a snake_case string used in student submissions and return its camelCase equivalent while maintaining the original meaning and structure of the identifier.
    

    """
import re

def snake_to_camel(word):
    """
    Create a function that standardizes student variable identifiers in the automated grading system by converting snake_case formatted strings (where words are separated by underscores) to camelCase format (where words after the first are capitalized with no separators). The function should take a snake_case string used in student submissions and return its camelCase equivalent while maintaining the original meaning and structure of the identifier.
    

    """
    return ''.join((x.capitalize() or '_' for x in word.split('_')))