Help me in solving CLB089 problem

My issue

I don’t understand how the are filled while declaring array

My code

#include <stdio.h>

int main(void) {
	// your code goes here
	char days[4][10]= {"Monday","tuesday","Wednesday","Thursday"};
	printf("%s\n",days[ 2 ]);
	printf("%s",days[ 3 ]);
	return 0;

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

look days[4][10] here 4 determines how many days and 10 determines the maximum length of the day’s name .