/* 4-letter word unscrambling */
#include<stdio.h>
#include<string.h>
int main()
{
	 int i,j,k,l,sum=6;
	 char str[5];
	 printf("Enter a 4-letter word or string : ");
	 scanf("%s",str);
	 if (strlen(str) == 4)
	 {
	 printf("The possible combinations of the given 4-letter word is shown.");
	 for (i = 0; i < 4; i++)
	 	for (j = 0; j < 4; j++)
		    if (i != j)
			{
			    for (k = 0; k < 4; k++)
				if ((k != i) && (k != j))
					{
					    l = sum - (i + j + k);
					    printf("\n%c%c%c%c",str[i],str[j],str[k],str[l]);
					}
			}
	 printf("\nTotal combinations = %d",4*3*2*1);
	 }
	 else
		printf("\nInvalid string. Length of the string must be 4-letters only ");
	return 0;
} /* End of Main */