Create a Python program to generate Random Strings with 5 characters
import random

def generate_random_str(): 
    char_set = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    random_str = ''.join(random.sample(char_set, 5))

    return random_str