alphanum = list("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
def ntoten(num, n):
	str = list(num)
	str = str[::-1]
	i = 0
	for x in xrange(len(str)):
		i = i + (alphanum.index(str[x]) * pow(n, x))
		
	return i
	
def tenton(num, n):
	str = list()
	
	if(num == 0):
		str.append(alphanum[1])

	while(num is not 0):
		rem = num % n
		str.append(alphanum[rem])
		num = num / n
		
	str = str[::-1]
	str = "".join(str)
	
	return str