Generate combination of two equal length string which is belong to index

// C Program
// Generate combination of two equal length string which is belong to index 
#include <stdio.h>
#include <string.h>

// Display result
void printSequence(char result[], int n)
{
	for (int i = 0; i < n; ++i)
	{
		printf("  %c", result[i]);
	}
	printf("\n");
}
void findCombination(char *text1, char *text2, 
                     char result[], int index, int n)
{
	if (index == n)
	{
		// Display calculated result
		printSequence(result, index);
		return;
	}
	if (index >= n)
	{
		// Base case when stop process
		return;
	}
	// Collects resultant value of text1
	result[index] = text1[index];
	findCombination(text1, text2, result, index + 1, n);
	// Collects resultant value of text2
	result[index] = text2[index];
	findCombination(text1, text2, result, index + 1, n);
}
void combination(char *text1, char *text2)
{
	if (strlen(text1) != strlen(text2))
	{
		// When string are not equal to each other
		return;
	}
	int n = strlen(text1);
	printf("\n Given Text1 : %s Text2 : %s \n", text1, text2);
	// Collect result
	char result[n];
	// Test
	findCombination(text1, text2, result, 0, n);
}
int main()
{
	combination("XYZ", "ABC");
	combination("abcd", "efgh");
	return 0;
}

Output

 Given Text1 : XYZ Text2 : ABC
  X  Y  Z
  X  Y  C
  X  B  Z
  X  B  C
  A  Y  Z
  A  Y  C
  A  B  Z
  A  B  C

 Given Text1 : abcd Text2 : efgh
  a  b  c  d
  a  b  c  h
  a  b  g  d
  a  b  g  h
  a  f  c  d
  a  f  c  h
  a  f  g  d
  a  f  g  h
  e  b  c  d
  e  b  c  h
  e  b  g  d
  e  b  g  h
  e  f  c  d
  e  f  c  h
  e  f  g  d
  e  f  g  h