def power(a,b):
	
	if b==0:
		return 1
	elif a==0:
		return 0
	elif b==1:
		return a
	else:
		return a*power(a,b-1)
def power(b2, b):
    if b == 0:
        return 1
    elif b2 == 0:
       
        return 0
    elif b == 1:
        return b2
    else:
        return b2 * power(b2, b - 1)