// An isogram is a word, in which no letter of the alphabet 
// occurs more than once. Write a C program that reads in 
// strings until Ctrl+D, and checks whether the string is an isogram. 

#include <stdio.h>
#include <string.h>
#include <ctype.h>

#define MAX 100

// Sample input/output

// hello
// This is not an isogram
// table
// This is an isogram
// CtrlD

int main (void) {
    // PUT YOUR CODE HERE

    return 0;
}