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

using namespace std;

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

string s1, s2;

int ct = 0;

int pattern[2000000];
vector <int> v;

void Pattern(string s1)
{
    int i = 0;
    int j = 1;
    pattern[0] = 0;
    while(j < s1.size())
    {
        if(s1[i] == s1[j])
        {
            i++;
            pattern[j] = i;
            j++;
        }
        else
        {
            if(i != 0)
                i = pattern[i - 1];
            else
            {
                pattern[j] = 0;
                j++;
            }

        }
    }
}

void KMP(string s1, string s2)
{
    int i = 0;
    int j = 0;
    while(i < s2.size())
    {
        if(s2[i] == s1[j])
        {
            i++;
            j++;
        }

        if(j == s1.size())
        {
            ct++;
            if(v.size() < 1000)
                v.push_back(i - s1.size());
            j = pattern[j - 1];
        }

        if(s2[i] != s1[j])
        {
            if(j != 0)
                j = pattern[j - 1];
            i++;
        }
    }
}

int main()
{
    fin >> s1 >> s2;
    Pattern(s1);
    KMP(s1, s2);
    fout << ct << '\n';
    for(int i = 0; i < v.size(); i++)
        fout << v[i] <<' ';
    return 0;
}