#include <iostream>
#include <algorithm>
#include <fstream>
#include <string>
using namespace std;
string a,c;
unsigned int z[3000001];
int rez[2000001],cont,l,lef,righ;
void Z()
{
    int n=c.size();
    for(int i=1; i<n; i++)
    {
        if(i>righ)
        {
            while(z[i]+i<n and c[z[i]+i]==c[z[i]])
                ++z[i];
            lef=i;
            righ=i+z[i]-1;
        }
        else
        {
            if(i+z[i-lef]-1<righ)
                z[i]=z[i-lef];
            else
            {
                z[i]=righ-i+1;
                while(z[i]+i<n and c[z[i]+i]==c[z[i]])
                    ++z[i];
                lef=i;
                righ=i+z[i]-1;
            }
        }
        if(z[i]==l)
        {
            ++cont;
            if(cont<=1000)
                rez[cont]=i-l-1;
        }
    }
}

int main()
{
    ifstream cin ("strmatch.in");
    ofstream cout ("strmatch.out");
    getline(cin,a);
    c=a;
    l=a.size();
    c.push_back('$');
    cin>>a;
    c+=a;
    Z();
    cout<<cont<<"\n";
    for(int i=1; i<=cont and i<=1000; i++)
        cout<<rez[i]<<" ";
    return 0;
}