#include <bits/stdc++.h>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
vector<int>rez;
int main()
{
    string pat,txt;
    f>>pat>>txt;
    vector<int>lps(pat.size());
    int i=1,len=0;
    while(i<pat.size())
        if(pat[i]==pat[len])
            len++,lps[i]=len,i++;
        else if(len)
            len=lps[len-1];
        else
            i++;
    i=0;
    int j=0;
    while(i<txt.size())
    {
        if(txt[i]==pat[j])
            i++,j++;
        if(j==pat.size())
            rez.push_back(i-j),j=lps[j-1];
        else if(i<txt.size()&&pat[j]!=txt[i])
            if(j)
                j=lps[j-1];
            else
                i++;
    }
    g<<rez.size()<<'\n';
    for(int i=0; i<max(int(rez.size()),1000); i++)
        g<<i<<" ";
    return 0;
}