
    Develop a function for the learning management system that converts assessment metric names from database format (snake_case) to frontend format (camelCase) to ensure proper data display in student progress reports. The function should handle any length of snake_case input string containing only lowercase letters and underscores, transforming it into a valid camelCase string that maintains the original meaning of the metric name.
    

    
def snake_to_camel(word):
    """
    Develop a function for the learning management system that converts assessment metric names from database format (snake_case) to frontend format (camelCase) to ensure proper data display in student progress reports. The function should handle any length of snake_case input string containing only lowercase letters and underscores, transforming it into a valid camelCase string that maintains the original meaning of the metric name.
    

    """
import re

def snake_to_camel(word):
    """
    Develop a function for the learning management system that converts assessment metric names from database format (snake_case) to frontend format (camelCase) to ensure proper data display in student progress reports. The function should handle any length of snake_case input string containing only lowercase letters and underscores, transforming it into a valid camelCase string that maintains the original meaning of the metric name.
    

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