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

char *alternate(char c1, char c2, int n)
{
     char *temp;
     int i;
     
     temp=(char *) malloc(n*sizeof(char)+1);
     for (i=0;i<(n/2)*2;i+=2)
     {
         temp[i]=c1;
         temp[i+1]=c2;
     }
     if (n%2!=0)
        temp[n-1]=c1;
     temp[n]='\0';
     
     return temp;
}

main()
{
      char a,b,*p;
      int c;
      scanf("%c",&a);
      scanf("%c",&b);
      scanf("%d",&c);
      p=alternate(a,b,c);
      puts(p);
      system("pause");
}