import re
import sys

def extract_area_code(line: str) -> str:
    # While this regex seems complicated, it essentially enforces either of two possible formats
    # Returning the area code captured in group(1)
    p = re.compile(r'^[+0](\d{2})\s(?:\d-\d{3}-\d{3}|\d{3}-\d{2}-\d{2})$')
    m = p.match(line)
    return m.group(1) if m else "<NONE>"

if __name__ == "__main__":
    for line in sys.stdin:
        stripped_line = line.strip()
        print(extract_area_code(stripped_line))