#include<stdio.h>
#include<iostream.h>
#include<fstream.h>
#include<string.h>

int main(int argc, char** argv){

	ifstream infile;
  	ofstream outfile;
	int len;
	char* buf;
	char ch;
	if(argc!=4){
		printf("\nuse: %s infile outfile len\n",argv[0]);
		return 1;
	}
	infile.open(argv[1]);
	if(argc==4){
		outfile.open(argv[2]);
	}
	len=atoi(argv[3]);
	buf=new char[len+1];
	for(int i=0;i<len;i++){
		buf[i]=0;
	}
	while(!infile.eof()){
		//infile.getline(buf,5,EOF);
		for(i=0;i<len;i++){
			ch=infile.get();
			if(ch==' '||ch=='\n'){
				i--;
			}else{
				buf[i]=ch;
			}
		}
		buf[len]=0;
			
		outfile<<buf<<endl;
		cout<<buf<<endl;
	}
	infile.close();
	outfile.close();
	delete[]buf;
	return 0;
}