
    Write a function that transforms student performance metric names from the legacy data format (snake case) to the new learning management system's standardized format (camel case) to ensure consistent display across student progress reports and dashboards. The function must handle any valid snake case metric name containing only lowercase letters and underscores, converting it to its equivalent camel case format while preserving the original meaning of the metric.
    

    
import re

def snake_to_camel(word):
    """
    Write a function that transforms student performance metric names from the legacy data format (snake case) to the new learning management system's standardized format (camel case) to ensure consistent display across student progress reports and dashboards. The function must handle any valid snake case metric name containing only lowercase letters and underscores, converting it to its equivalent camel case format while preserving the original meaning of the metric.
    

    """
import re

def snake_to_camel(word):
    """
    Write a function that transforms student performance metric names from the legacy data format (snake case) to the new learning management system's standardized format (camel case) to ensure consistent display across student progress reports and dashboards. The function must handle any valid snake case metric name containing only lowercase letters and underscores, converting it to its equivalent camel case format while preserving the original meaning of the metric.
    

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