Help me in solving CLB027 problem

My issue

if we declare the array size and take the strings why does it give a problem to the output??

My code

#include <stdio.h>
//initializing two string / char array with "code" && "chef"
char a[4] = "code";
char b[4] = "chef";
int main(void) {
	printf("%s", a);
	printf("%s", b);
	return 0;

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

The way the string is stored in the array is {‘c’,‘o’,‘d’,‘e’,‘\0’}
There is an additional space because of \0 . therefore the size of array is 5 not 4