Feedback for CLB041 problem

Learning course: Learn C
Problem Link: CodeChef: Practical coding for everyone

Feedback

Why I am getting error even though I write correct
It’s bad

see the output format
include <stdio.h>
#include<string.h>

int main(void) {
char txt[] = “NumeroTres”;
int a = strlen(txt);
printf(“The length of the word is: %d”,a);
return 0;
}