#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#define Nmax 2000000
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
string s1,s2;
vector<int> v1;
int vec[Nmax];
void constuctie(int vec[],int lungime)
{
    int ok;
    int i=0,j;
    for(j=1;j<=lungime;j++)
    {
        if(s1[i]==s1[j])
        {
            vec[j]=i+1;
            i++;
            j++;
        }
        if(s1[i]!=s1[j]&&i!=0)
        {
            ok=1;

            while(ok&&i!=0)
            {
            i=vec[i-1];
            if(s1[j]==s1[i])
            {
                vec[j]=i+1;
                ok=0;
            }
            }
            if(i==0&&s1[j]==s1[i])
            vec[j]=vec[i]+1;
            else if(i==0&&s1[j]!=s1[i])
            {
                vec[j]=0;
            }

        }
    }
}

int main()
{
    getline(f,s1);
    getline(f,s2);
    int lungime=s1.size()-1;
    int i=0;
    int j=0;
    int nr=0;
    constuctie(vec,lungime);
    for(i=0;i<s2.size();i++)
    {
        if(s1[j]==s2[i])
        {
            j++;
            //cout<<j<<' ';
            if(j==s1.size())
            {
                nr++;
                if(nr<1001)
                v1.push_back(i-j+1);
                j--;
                j=vec[j];
                if(i+1<s2.size()&&s1[j]!=s2[i+1])
                    j=0;
            }
        }
        else if(s1[j]!=s2[i]&&j!=0)
        {
            if(s1[vec[j]]==s2[i])
            j=vec[j]+1;
            else if(s1[0]==s2[i])
                j=1;
            else j=0;
        }
    }
    if(nr!=0)
    {
        g<<nr<<"\n";
        for(int i=0;i<v1.size();i++)
            g<<v1[i]<<' ';
    }

    return 0;
}