[Link] https://www.acmicpc.net/problem/1786
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import java.util.*;
import java.io.*;
public class Main {
static BufferedReader br;
static StringBuilder sb = new StringBuilder();
public static void main(String[] args) throws IOException {
br = new BufferedReader(new InputStreamReader(System.in));
StringBuilder sb = new StringBuilder();
String t = br.readLine(), p = br.readLine();
int[] pi = new int[p.length()];
ArrayList<Integer> al = new ArrayList<>();
getPi(pi, p);
int l = 0, r = 0, cnt = 0;
while(l < t.length()) {
while(r > 0 && t.charAt(l) != p.charAt(r)) r = pi[r - 1];
if(t.charAt(l) == p.charAt(r)) {
if(r == p.length() - 1) {
cnt++;
al.add(l + 2 - p.length());
r = pi[r];
}
else r++;
}
l++;
}
println(cnt);
for(int e: al) sb.append(e).append(" ");
print(sb);
}
static public void getPi(int[] pi, String p) {
int l = 0;
for(int r = 1; r < p.length(); r++) {
while(l > 0 && p.charAt(l) != p.charAt(r)) l = pi[l - 1];
if(p.charAt(l) == p.charAt(r)) pi[r] = ++l;
}
}
static int toi(String s) { return Integer.parseInt(s); }
static String[] getLine() throws IOException { return br.readLine().split(" "); }
static int[] getArr() throws IOException { return Arrays.stream(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray(); }
static <T> void print(T s) { System.out.print(s); }
static <T> void println(T s) { System.out.println(s); }
}