
    Develop a system to organize event categories within each friend group's interest lists, where each group's interests need to be alphabetically sorted to improve event matching accuracy. The function should take a list of friend groups' interests, where each inner list contains various event categories, and return the same structure with each group's interests sorted alphabetically.
    

    
def sort_sublists(input_list):
    """
    Develop a system to organize event categories within each friend group's interest lists, where each group's interests need to be alphabetically sorted to improve event matching accuracy. The function should take a list of friend groups' interests, where each inner list contains various event categories, and return the same structure with each group's interests sorted alphabetically.
    

    """
def sort_sublists(input_list):
    """
    Develop a system to organize event categories within each friend group's interest lists, where each group's interests need to be alphabetically sorted to improve event matching accuracy. The function should take a list of friend groups' interests, where each inner list contains various event categories, and return the same structure with each group's interests sorted alphabetically.
    

    """
    result = [sorted(x, key=lambda x: x[0]) for x in input_list]
    return result