#include <iostream>
#include <string.h>
#include <fstream>

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

int n, m;
int prefix[2000005], pos[1005], nr;
char N[2000005], M[2000005];

int main()
{
    f.getline(M, 2000001);
    f.getline(N, 2000001);
    n = strlen(N);
    m = strlen(M);
    for(int i = n; i > 0; i--) N[i] = N[i-1];
    for(int i = m; i > 0; i--) M[i] = M[i-1];
    M[0] = N[0] = ' ';
    int q = 0;
    for(int i = 2; i <= m; i++)
    {
        while(q && M[q+1] != M[i]) q = prefix[q];
        if(M[q+1] == M[i]) q++;
        prefix[i] = q;
    }
    q = 0;
    for(int i = 1; i <= n; i++)
    {
        while(q && M[q+1] != N[i]) q = prefix[q];
        if(M[q+1] == N[i]) q++;
        if(q == m)
        {
            pos[++nr] = i - m;
            q = prefix[q];
        }
        if(nr == 1000) i = n;
    }
    g<<nr<<'\n';
    for(int i = 1; i <= nr; i++) g<<pos[i]<<' ';
    g<<'\n';
    return 0;
}