#!/usr/bin/env python3
"""Extract Naver Place IDs from links arrays"""
import re
import json
import sys

def extract_place_id(links):
    """Extract first valid Naver Place ID from list of URLs"""
    place_ids = set()
    for link in links:
        # Pattern: place/DIGITS in map.naver.com URLs
        # But NOT in search URLs or directions URLs with coordinates
        if 'map.naver.com' in link:
            matches = re.findall(r'place/(\d{7,12})', link)
            for m in matches:
                # Filter out coordinate-like numbers (14140xxx pattern)
                if not m.startswith('1414'):
                    place_ids.add(m)

    if place_ids:
        # Return the most common ID (first one found in entry/place URLs)
        for link in links:
            if 'entry/place/' in link:
                match = re.search(r'entry/place/(\d{7,12})', link)
                if match and not match.group(1).startswith('1414'):
                    return match.group(1)
        # Fallback: return smallest ID (usually the main one)
        return min(place_ids, key=len)
    return None

if __name__ == '__main__':
    data = json.load(sys.stdin)
    pid = extract_place_id(data)
    if pid:
        print(pid)
    else:
        print("NOT_FOUND")