function formatDateString(gregorianDate) {
    const date = gregorianDate.split(" ");
    const day = date[0].padStart(2, "0");
    const month = date[1].padStart(2, "0");
    const year = date[2].padStart(4, "0");
    return `${year}-${month}-${day}`;
}

function calculateFine(dateReturned, dateDue) {
    const returnedDate = new Date(dateReturned);
    const dueDate = new Date(dateDue);
    const distanceInDays = (returnedDate - dueDate) / (1000 * 60 * 60 * 24);

    if (distanceInDays <= 0) return 0;
    
    const chargePerDay = 15;
    const chargePerMonth = 500;
    const chargePerYear = 10000;
    
    const daysLate = returnedDate.getDate()  - dueDate.getDate();
    const monthsLate = returnedDate.getMonth() - dueDate.getMonth();
    const yearsLate = returnedDate.getFullYear() - dueDate.getFullYear();

    if (yearsLate > 0) {
        return chargePerYear;
    }
    
    if (monthsLate > 0) {
        return monthsLate * chargePerMonth;
    }
    
    if(daysLate > 0) {
        return daysLate * chargePerDay;
    }
}

function processData(input) {
    var input_stdin_array = input.split("\n");
    const dateReturned = formatDateString(input_stdin_array[0]);
    const dateDue = formatDateString(input_stdin_array[1]);
   
    console.log(calculateFine(dateReturned, dateDue));
}