from collections import Counter

# Example: Count occurrences of user agents from web server logs
user_agents = [
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36",
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
    "Mozilla/5.0 (Linux; Android 10; SM-G960F) AppleWebKit/537.36",
    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36",
]

agent_counts = Counter(user_agents)
print(f"User Agent Counts: {agent_counts}")

# Get the 2 most common agents
print(f"Most common agents: {agent_counts.most_common(2)}")

# Example 2: Counting tags for blog posts
post_tags = [
    "python", "flask", "databases", "python", "javascript",
    "flask", "orm", "web-dev", "python", "databases"
]
tag_counts = Counter(post_tags)
print(f"Tag Counts: {tag_counts}")