#include <fstream>
#include <cstring>
#include <string>

using namespace std;

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

int pattern[2000001];

void Pattern( string s1, int n)
{
    for(int i = 0; i < n; i++)
        if(pattern[i + 1] == 0)
            for(int j = i + 1; j < n; j++)
                if(s1[i] == s1[j])
                    pattern[j + 1] = i + 1;
}

int main()
{
    string s1, s2;
    fin >> s1 >> s2;
    int l1 = s1.length(), l2 = s2.length(), sol[1000];
    Pattern(s1, l1);
    int i = 0, j = 0, k = 0, ct = 0;
    while(i < l2)
    {
        int ii = i, jj = j;
        while(s2[ii] == s1[jj])
        {
            ii++;
            jj++;
            if(jj == l1)
            {
                k++;
                if(ct < 1000)
                    sol[ct++] = ii - l1;
            }
        }
        i += (pattern[j] + 1);
        j = pattern[j];
    }
    fout << k << '\n';
    for(i = 0; i < ct; i++)
        fout << sol[i] <<' ';
}