# Python stdlib
from math import sqrt, pi
from random import randint
# Numpy stuff
from Numeric import *
from MLab import eye
from LinearAlgebra import singular_value_decomposition, determinant
from RandomArray import random, normal
# Biopython stuff
from Bio.PDB import *

S=eye(3,3, typecode='d')
S[2,2]=-1

print S**3.8