day_num = int(input())

if day_num == 1:
    print('Monday')
elif day_num == 2:
    print('Tuesday')
elif day_num == 3:
    print('Wednesday')
elif day_num == 4:
    print('Thursday')
elif day_num == 5:
    print('Friday')
elif day_num == 6:
    print('Saturday')
elif day_num == 7:
    print('Sunday')
else:
    print('Error')