```#!/usr/local/bin/python
# \$Id: moments.python,v 1.4 2001/05/09 00:58:40 doug Exp \$
# http://www.bagley.org/~doug/shootout/

import sys, string, math, operator

def main():
sum = 0
nums = []
atof = string.atof

nums = map(atof, sys.stdin.readlines())
sum = reduce(operator.add, nums)

n = len(nums)
mean = sum/n
average_deviation = 0
standard_deviation = 0
variance = 0
skew = 0
kurtosis = 0

for num in nums:
deviation = num - mean
average_deviation += abs(deviation)
variance += deviation**2;
skew += deviation**3;
kurtosis += deviation**4

average_deviation /= n
variance /= (n - 1)
standard_deviation = math.sqrt(variance)

if variance > 0.0:
skew /= (n * variance * standard_deviation)
kurtosis = kurtosis/(n * variance * variance) - 3.0

nums.sort()
mid = n / 2

if (n % 2) == 0:
median = (nums[mid] + nums[mid-1])/2
else:
median = nums[mid]

print "n:                  %d" % n
print "median:             %f" % median
print "mean:               %f" % mean
print "average_deviation:  %f" % average_deviation
print "standard_deviation: %f" % standard_deviation
print "variance:           %f" % variance
print "skew:               %f" % skew
print "kurtosis:           %f" % kurtosis

main()

```