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Given the following text description, write Python code to implement the functionality described below step by step
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Description:
 Structures like these are encoded in "PDB" files
Entries are determined by columns in the file, not by spaces between the columns
Step1:  Predict what the following will do
Step2:  Write a program that
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Python Code:
#record   atom_name chain           x       y       z   occupancy        atom_type
#  |          |       |             |       |       |      |                  |
#ATOM   1086  CG  LYS A 141      -4.812   9.683   2.584  1.00 26.78           N0
#         |        |      |                                     |
#    atom_num amino_acid  resid_num                           bfactor
Explanation: Structures like these are encoded in "PDB" files
Entries are determined by columns in the file, not by spaces between the columns
End of explanation
line_frompdb = "ATOM   1086  N   SER A 141      -4.812   9.683   2.584  1.00 26.78           N0"
print(line_frompdb[2:4])
Explanation: Predict what the following will do
End of explanation
#record   atom_name chain           x       y       z   occupancy        atom_type
#  |          |       |             |       |       |      |                  |
#ATOM   1086  CG  LYS A 141      -4.812   9.683   2.584  1.00 26.78           N0
#         |        |      |                                     |
#    atom_num amino_acid  resid_num                           bfactor
Explanation: Write a program that: 
+ Reads a pdb file (download 1stn.pdb)
+ Grabs all "ATOM" lines whose atom type is "CA" 
+ Shifts the position of the molecule in x by +10 angstroms
+ Writes out a new pdb file containing these shifted atoms
+ If you want to check your work, download PyMOL and open up the files
End of explanation
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