public class ParameterFuzo {
  public static void main( String args[] ) {
    StringBuffer sb = new StringBuffer();
    for( int i = 0 ; i < args.length ; ++i ) {
      if( sb.length() > 0 )	// Ha nem az elso parameter
      	sb.append( "_" );
      sb.append( args[i] );
    }
    String eredmeny = new String( sb );
    System.out.println( eredmeny );
  }
}