Help me in solving STRR2 problem

help
,
1

My issue

My code

#include <stdio.h>
 
int main() {
  char x[30] = "Hello";
  char y[] = "World";
 
  // Concatenate str2 to str1 (the result is stored in str1)
  strcat(x, y);
  
  // Print str1
  printf("%s", x);
 
  return 0;
}

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