PrefixFun. CnuttMorisPratt

import java.io.*;
import java.util.*;

public class Uyi{
    public static Scanner s = new Scanner(System.in);
    public static PrintWriter out = new PrintWriter(System.out, true);


    public static void main(String[] args) {
        String s1 = s.next();
        String s2 = s.next();
        String s3 = s2 + '#' + s1;
        int [] prefix = prefix(s3);
        int counter = 0;
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = s2.length(); i < s3.length(); i++) {
            if (prefix[i] == s2.length()){
                counter++;
                list.add(i - 2 * s2.length());
            }
        }
        System.out.println(counter);
        for (int x: list) {
            System.out.println((x+1) + " ");
        }
    }
    static int [] prefix (String sk){
        char [] s = sk.toCharArray();
        int n = sk.length();
        int [] pi = new int [n];
        for (int i = 1; i < n; i++) {
            int j = pi[i-1];
            while (j > 0 && s[i] != s[j])
                j = pi[j-1];
            if (s[i] == s[j])  ++j;
            pi[i] = j;
        }
        return pi;
    }
}