#include <bits/stdc++.h>
#define NMAX 5020200
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
string s,a;
int j, lps[NMAX],cnt,nr,i;
int main()
{
    fin>>a>>s;
    s=a+'#'+s;
    i=1;
    while(i<s.size())
    {
        if(s[i]==s[j] && j<i)
        {
            ++j;
            lps[i++]=j;
            if(j==a.size())
                ++nr;
        }
        else
        {
            if(j==0)
                lps[i++]=0;
            else j=lps[j-1];
        }
    }

    fout<<nr<<'\n';
    nr=min(nr, 999);
    for(int i=a.size()+2;i<=s.size() && cnt<=nr;++i)
        if(lps[i]==a.size())
        {
            fout<<i-2*a.size()<<" ";
            ++cnt;
        }
    return 0;
}