/* The strncat() function. */

#include <stdio.h>
#include <string.h>

char str2[] = "abcdefghijklmnopqrstuvwxyz";

main()
{
     char str1[27];
     int n;

     for (n=1; n < 27; n++)
     {
         strcpy(str1, "");
         strncat(str1, str2, n);
         puts(str1);
     }
     return(0);
}