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

int main (int argc, char * argv[])
{
  int c;
  int i = 0;
  int MAX = 100;

  if(argc!=2)
    {
    printf("tak to teda ne");
    exit(EXIT_FAILURE);
    }

  int N=atoi(argv[1]);

  char *pole = malloc(MAX*sizeof(char));
  if(pole == NULL)
    return 0;

  while((c=getchar()) != EOF)  {
    pole[i] = (char)c;
  //  putchar(pole[i]);
    i++;
  }

i = 0;

  for(int k = 0; k < 3; k++)
    {
      if((i + N) < MAX && pole[i] == pole[i+N])
        {
        putchar(pole[i]);
        i++;
        }
      else
        {
        putchar(pole[i]);
        }
    }



  free(pole);
  return 0;

}