from datetime import date, timedelta
from typing import Dict


def get_due_dates(start: date) -> Dict[int, date]:
    return {
        1: start,
        2: start + timedelta(days=30),
        3: start + timedelta(days=60),
        4: start + timedelta(days=90),
        5: start + timedelta(days=120),
        6: start + timedelta(days=150),
    }