#include <stdio.h>
#include <string.h>
#include <string.h>
#include <ctype.h>
using namespace std;

#define DEBUG 0
#define III if(DEBUG)
#define LEN 11000

int main() {
  int a,b,c,d,i,j, len;
  char line[LEN], line2[LEN], line3[LEN];
  bool outOfLine;
  //int inty[];
  scanf("%d\n", &len);
  fgets(line, LEN-1, stdin);
  while(len) {
    a=b=0;
    while( line[a] ){
	   if ( ! isspace(line[a]) ) {
	     line2[b]=toupper( line[a] );
		 b++;
	   }
	   a++;
	} //line2 is CLEAN!
	line2[b]=0;
	
	III printf("Line2 %d: %s\n", __LINE__, line2);
	
	if(len<b) { //cipherable
	  //fill the cipher Line3
	  memset(line3,'*', b);
	  
	  a=0; //my index
	  outOfLine =1;
	  int cipherInd =0;
	  while(a<b) { //b =index of the last char 0
	    if (outOfLine) {
		  bool found =0;
		  cipherInd =0;
		  //find the desirable char
		  while(! found) {
		    if (line3[cipherInd] == '*')
			  found =1;
			else
			  cipherInd ++;
		  }
		  
		  line3[cipherInd] =line2[a];
		  a++;
		  outOfLine =0;
		} else { //non outOfLine
		  cipherInd +=len;
		  if (cipherInd >b)
		    outOfLine =1;
		  else {
		    line3[cipherInd] =line2[a];
			a++;
		  }
		}
		III printf("Line3 %d: %s\n",__LINE__, line3);
	  }
	  //writeout
	  printf("%s\n", line3);
	} else //non cipherable
	  printf("%s\n", line2);
	
	//next case
    scanf("%d\n", &len);
    fgets(line, LEN-1, stdin);
  }
  return 0;
}