public class exo5 {
	public static void main(String args[]){

	String exe = " ";
	exe = args [0];
	System.out.println("before exe = " + exe);
	exe = buildString ( exe);
	System.out.println( " after exe = " + exe);
}



public static String buildString(String s) {
	String r="";
	for(int i=0 ; i<s.length() ; i++){
		if(keepChar(s.charAt(i),i)) {
		r=r+s.charAt(i);
		}
	}
	return r;
}

public static boolean keepChar(char c,int position) {
	if(position%2==1){
		return true;
	}else{
		return false;
}
}
}