def day_to_string(day):
    if(day == 0):
        return "Monday"
    if(day == 1):
        return "Tuesday"
    if(day == 2):
        return "Wednesday"
    if(day == 3):
        return "Thursday"
    if(day == 4):
        return "Friday"
    if(day == 5):
        return "Saturday"
    if(day == 6):
        return "Sunday"