#include <bits/stdc++.h>

using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

string A,B;
int n, m;
int pi[20000005];
int nr;
vector<int> res;

void Read()
{
 f>>A;
 f>>B;

 m = A.length();
 n = B.length();

 A.insert(0, " ");
 B.insert(0, " ");

 f.close();
}


void compute()
{
 int q = 0;

    for(int i = 2;i <= m;++i)
    {
        while(q && A[q + 1] != A[i])
            q = pi[q];
        if(A[q + 1] == A[i])
            ++q;
        pi[i] = q;
    }
}

void KMP()
{
 int q = 0;
 for(int i = 1;i <= n;++i)
 {
  while(q && A[q + 1] != B[i])
   q = pi[q];
  if(A[q + 1] == B[i])
   ++q;
  if(q == m)
  {
      ++nr;
   if(res.size() < 1000)
    res.push_back(i - m);
            q = pi[q];
  }
 }
}

void Print()
{
 g<<nr<<'\n';
 for(vector<int>::iterator it = res.begin();it != res.end();++it)
  g<<*it<<" ";
 g.close();
}

int main()
{
 Read();
 compute();
 KMP();
 Print();
 return 0;
}