#include <bits/stdc++.h>

using namespace std;
int phi[4000005];
vector<int>v;
int main()
{
    ifstream cin("strmatch.in");
    ofstream cout("strmatch.out");
    string a,b,s,car="*";
    int x;
    cin>>a>>b;
    s="#"+a+car+b;
    phi[0]=-1;
    for(int i=1; i<=s.size(); i++)
    {
        x=i-1;
        while(x>0)
        {
            if(s[i]==s[phi[x]+1])
                break;
            x=phi[x];
        }
        phi[i]=phi[x]+1;
    }
    int nr=0;
    for(int i=0;i<s.size();i++)
        if(phi[i]==a.size())
            {
                nr++;
                v.push_back(i-a.size()-1-a.size());
            }
    cout<<nr<<"\n";
    for(int i=0;i<min(nr,1000);i++)
        cout<<v[i]<<" ";
    return 0;
}