#include <stdio.h>
#include <stdlib.h>

#define maxitem 2048

static char *myname;

void usage()
{
fprintf(stderr,"Usage: %s [-m max_repeats] number of parameters on one line\n",myname);
exit(20);
}

main(argc,argv)
char **argv; int argc;
{
int nit,n,ma,i;
char s[maxitem];

ma = -1;
myname= *argv;
if(argc==4) {argv +=2; if(1!= sscanf(*argv,"%d",&ma))usage(); argc=2;}
if(ma==0) exit(0);
if(argc!=2|| 1!= sscanf(*++argv,"%d",&nit)) usage();
if(nit <=0) usage();

n=i=0;
while(scanf("%s",s)==1)
	{
	n++;
	fputs(s,stdout);
	fputc((n%=nit)?' ':'\n',stdout);
	if(n==0) i++;
	if(i>=ma && ma >=0 ) break;
	}
if(n) fputc('\n',stdout);
}