if h>50 :
w l evl e = 1
elif h>20 :
w l evl e = 2
el se :
w l evl e = 3
B . wlevle=0if h>50:
wlevle= 1
elif h>30:
wlevle=2
elif h>20:
wlevle=3
C . wlevle=0if h>20 and h<=30:
wlevle=3
elif h>30 and h<=50:
wlevle=2
else:
wlevle= 1
D . wlevle= 1if h<=20:
wlevle=0
elif h<=30:
wlevle=3
elif h<=50:
wlevle=2