#!/usr/bin/env python3

from datetime import date
import sys

if len(sys.argv) != 2:
    print(f'Usage: {sys.argv[0]} <year>')
    sys.exit(1)

year = int(sys.argv[1])

for month in range(1, 13):
    for day in range(1, 32):
        try:
            d = date(year, month, day)
            if d.weekday() == 3:  # 3 == Thursday 
                print(f'{year}-{month:02d}-{day:02d}')
        except ValueError:
            continue