import java.util.Scanner;
public class ThreeLetterWords {


    static void generate(StringBuilder sb, int n, String characters) {
        char[] alphabet = characters.toCharArray();
        if (n == sb.length()) {
            System.out.println(sb.toString());
            return;
        }
        for (char letter : alphabet) {
            sb.setCharAt(n, letter);
            generate(sb, n + 1, characters);
        }
    }


    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String characters = input.next();
        StringBuilder sb = new StringBuilder();
        sb.setLength(3);
        generate(sb, 0, characters);
        }
    }