#include <bits/stdc++.h>
#define L 4000005
#define LIM 1000
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

string a, b, s;
int z[L];

void Z(){
  s = a + "#" + b;
  z[0] = 0;
  int r = 1, l = 0;
  for (int i = 1; i < (int)s.size(); i++){
    z[i] = min(r - i, z[i - l]);
    while (i + z[i] < (int)s.size() && s[z[i]] == s[i + z[i]])
      z[i]++;
    if (i + z[i] >= r){
      r = max(i + 1, i + z[i]);
      l = i;
    }
  }
}

int main(){
  fin >> a >> b;
  Z();
  int r = 0;
  for (int i = a.size() + 1; i < (int)s.size(); i++)
    r += (z[i] == (int)a.size());
  fout << r << "\n";
  int out = 0;
  for (int i = a.size() + 1; i < (int)s.size() && out < LIM; i++)
    if (z[i] == (int)a.size()){
      fout << i - a.size() - 1 << " ";
      out++;
    }
  fout << "\n";
  return 0;
}