
    Design a function for the automated assessment system that converts student-submitted Python variable names from snake_case format to JavaScript's camelCase format to enable cross-language code evaluation. The function should handle any valid snake_case variable name containing only lowercase letters and underscores, transforming each underscore-separated word after the first one to begin with a capital letter while removing the underscores.
    

    
def snake_to_camel(word):
    """
    Design a function for the automated assessment system that converts student-submitted Python variable names from snake_case format to JavaScript's camelCase format to enable cross-language code evaluation. The function should handle any valid snake_case variable name containing only lowercase letters and underscores, transforming each underscore-separated word after the first one to begin with a capital letter while removing the underscores.
    

    """
import re

def snake_to_camel(word):
    """
    Design a function for the automated assessment system that converts student-submitted Python variable names from snake_case format to JavaScript's camelCase format to enable cross-language code evaluation. The function should handle any valid snake_case variable name containing only lowercase letters and underscores, transforming each underscore-separated word after the first one to begin with a capital letter while removing the underscores.
    

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