List within a list

[agentsmith]

I wrote a code that uses list structure to take an input and print out a reverse as soon as a '.' character is entered.
Next thing i wanted to do was to make the function print out the words in reverse; e.g.
Sample
Code
Test
.
output:
Test
Code
Sample.

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

typedef struct { char k; struct List *next; } List;

Sergey *insertList(char head, List*tail)
{
	List *t = calloc (1,sizeof (List));
	t->k = head;
	t->next = tail;
	return t;
}
	
int backward_print(List *j)
{
	while (j != NULL){
		printf("%c", j -> k);
		j = j -> next;
		}
		printf("\n");
		return 0;
}

int main(void)
{
	char s;
	List *S = NULL;
	while (s != '.'){
		s = getchar();
		S = insertList(s, S);
		}
		backward_print(S);
		return 0;
}

this is my code so far. i thought of inserting list within a list, but i am not sure how to modify the present code to achieve that. thanks

[Salem]

Just make all your 'char' into char arrays, and (for something simple), read the input with scanf("%s

What's "Sergey" ?