//code to parse PDB files from command line
#include<iostream>
#include<fstream>
#include<cstdlib>
#include<string>
#include<sstream>
using namespace std;
int main(int argc, char* argv[])
{
	if(argc<2) { cerr<<"Please enter a file name to parse"<<endl;
		     exit(1); }
        ifstream fin(argv[1]);
	ofstream fou("output");
	string s, temp;
	double x, y, z;
//	stringstream k;
	while(!fin.eof())
	{
		getline(fin, s, '\n');
		if(s.find("ATOM")==0) { stringstream k(s);
			               for(int i=0;i<6;i++) k>>temp;
				       k>>x;
				       k>>y;
				       k>>z;		
				       fou<<x<<" "<<y<<" "<<z<<'\n';	}
		
		
	}
			     
	return 0;
}