#include <fstream>
#include <cstring>


#define minim(a, b) ((a < b) ? a : b)
#define NMax 2000005

using namespace std;

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

int M, N;
char A[NMax], B[NMax];
int pi[NMax], pos[1024];

void make_prefix(void)
{
    int i, q = 0;

    for(i = 2, pi[1] = 0; i <= M; ++i)
    {
        while(q && A[q+1] != A[i])
            q = pi[q];
        if(A[q+1] == A[i])
            ++q;
        pi[i] = q;
    }
}

int main(void)
{
    int i, q = 0, n = 0;

    fin>>A>>B;
    M=strlen(A);
    N=strlen(B);
    for(i = M; i; --i) A[i] = A[i-1];A[0] = ' ';
    for(i = N; i; --i) B[i] = B[i-1];B[0] = ' ';

    make_prefix();

    for(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)
        {
            q = pi[M];
            if(n < 1000)
            {
                ++n;
                pos[n] = i-M;
            }
        }
    }
    fout<<n<<'\n';
    for(i = 1; i <= n; ++i)
        fout<<pos[i]<<' ';

    return 0;
}