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

#define START 97 //ASCII value of 'a'

int main()
{		
	char word[5];          //initial string to start with
	char strlist[25*5][5]; //array to store new strings derived from "word"
	char c1, c2;
	int i, j, count;
		
	printf("Please input a 5-letter word: ");
	scanf("%s", word);
	printf("\n Generating new stirngs from %s: \n", word);
	count = 0;

	//generate 25*5 new strings which differ from word in 1 letter
	for(i = 0; i < 5; i++)
	{
		c1 = word[i]; //process the ith letter in word
		for(j = 0; j< 26; j++)
		{
			c2 = j + START;
			if( c2 == word[i]) //only use letter different from word[i]
				continue;
			
			strcpy(strlist[count], word);		
			strlist[count][i] = c2;
			printf("string %d: %s\n", count, strlist[count]);			
			count++;
		}
	}	

	return 0;
}