import re
import sys

def is_valid_nip(line: str) -> bool:
    # matching either:
    # xxx-xxx-xx-xx  OR  xxx-xx-xx-xxx
    p = re.compile(r'^(?:\d{3}-\d{3}-\d{2}-\d{2}|\d{3}-\d{2}-\d{2}-\d{3})$')
    return bool(p.match(line))

if __name__ == "__main__":
    for line in sys.stdin:
        stripped_line = line.strip()
        print("yes" if is_valid_nip(stripped_line) else "no")