#include <iostream>
#include <fstream>
#include <cstring>
#include <vector>

using namespace std;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

const int P = 62;
const int NMAX = 2e6 + 7;
const int m1 = 1e5 + 7;
const int m2 = 1e5 + 21;

int N,M,P1,P2,hashA1,hashA2,hash1,hash2;
vector <int> a;
char A[NMAX],B[NMAX];

int main()
{

    fin >> A >> B;
    N=strlen(A), M=strlen(B);

    P1=1, P2=1;
    for(int i=0;i<N;i++)
    {
        hashA1=(hashA1*P+A[i])%m1;
        hashA2=(hashA2*P+A[i])%m2;
        hash1=(hash1*P+B[i])%m1;
        hash2=(hash2*P+B[i])%m2;
        if(i!=0)
            P1=(P1*P)%m1,
            P2=(P2*P)%m2;
    }

    if(hashA1==hash1 and hashA2==hash2)
        a.push_back(0);

    for(int i=N;i<M;i++)
    {
        hash1=((hash1-(P1*B[i-N])%m1)*P+B[i])%m1;
        hash2=((hash2-(P2*B[i-N])%m2)*P+B[i])%m2;
        if(hash1==hashA1 and hash2==hashA2)
            a.push_back(i-N+1);
    }

    fout << a.size() << "\n";

    for(int i=0;i<a.size();i++)
    {
        if(i==1000)
            break;
        fout << a[i] << " ";
    }

    return 0;

}