JaeHyeonKim19

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

public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		String t = br.readLine();
		String p = br.readLine();
		if(t.length() < p.length()) {
			System.out.print(0);
			return;
		}
		ArrayList<Integer> list = new ArrayList<Integer>();
		int [] pi = new int[p.length()];
		int j = 0;
		for(int i = 1; i < p.length(); i++) {
			while(j > 0 && p.charAt(i) != p.charAt(j)) {
				j = pi[j - 1];
			}
			if(p.charAt(i) == p.charAt(j)) {
				pi[i] = ++j;
			}
		}

		j = 0;
		for(int i = 0; i < t.length(); i++) {
			while(j > 0 && t.charAt(i) != p.charAt(j)) {
				j = pi[j - 1];
			}
			if(t.charAt(i) == p.charAt(j)) {
				if(j == p.length() - 1) {
					list.add(i - p.length() + 2);
					j = pi[j];
				}else {
					j++;
				}
			}
		}
		bw.write(list.size() + "\n");
		for(int i = 0; i < list.size(); i++) {
			bw.write(list.get(i) + " ");
		}
		bw.flush();
	}
}