i=int(input())
if i==4:
 print(3)
elif i==6:
 print(5)
elif i==8 or i==9 or i== 10 or i==15 or i==16 or i==22:
 print(7)
elif i==12:
 print(11)
elif i==14:
 print(13)
elif i==20 or i==21:
 print(19)
elif i==24 or i==25:
 print(23)
else:
 print(8)