random characters in c

my program prints out characters that dont even exist, actually the program should try to guess the given word, here is my program

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

int main(){

    int index, i;
    time_t t;
    char characters[] = "bdefgir";
    char word[] = "friedberg";
    srand((unsigned)time(&t));
    char result[9] = {0};

    while(strcmp(result, wort) != 0){

        for (i = 0; i < 9; i++) {
            index = rand() % 8;
            result[i] = characters[index];
    }
        printf("Result:\t%s\n", result);

    }

    return 0;

}