
The_day=int(input('enter number the day, from 1 to 7 :'))
if The_day == 1:
  print('saturday')
elif The_day == 2:
  print('sunday')
elif The_day == 3:
  print('monday')
elif The_day == 4:
  print('tuesday')
elif The_day == 5:
  print('wednsday')
elif The_day == 6:
  print('thursday')
elif The_day == 7:
  print('friday')
else:
  print('invalid')