#include <stdio.h>
#include <string.h>
#define LEN 15

int main(void)
{
    char string[LEN+1], ch;


    printf("Enter a word>\n");
    scanf("%s", string);

    for (ch = 'a'; ch <= 'z'; ch++)
    {
        int count = 0, i;
        for (i = 0; i < strlen(string); i++)
        {
            if (ch == string[i])
            {
                count++;
            }
        }

        if (count > 1)
        {
            printf("Duplicate letter: %c, Occurrences: %d\n", ch, count);
        }
		else
		{
			printf("No duplicates found\n");
		}
    }

    return 0;
}