#include <bits/stdc++.h>

using namespace std;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

int kmp[4000004];
vector<int>p;

int main()
{
    string s,t;
    fin>>s>>t;
    t=" "+s+t;
    s=" "+s;
    int n=t.size()-1;
    int k=0;
    kmp[1]=0;
    for(int i=2;i<=n;i++)
    {
        while(k>0&&t[k+1]!=t[i])
        {
            k=kmp[k];
        }
        if(t[k+1]==t[i])
        {
            k++;
        }
        kmp[i]=k;
    }
    int ap=0;
    k=0;
    for(int i=s.size();i<t.size();i++)
    {
        while(k&&s[k+1]!=t[i])
        {
            k=kmp[k];
        }
        if(s[k+1]==t[i])
        {
            k++;
        }
        if(k==s.size()-1)
        {
            ap++;
            if(ap<=1000)
                p.push_back(i);
        }
    }
    fout<<ap<<"\n";
    for(auto a:p)
    {
        fout<<a -2*(s.size()-1)<<" ";
    }
    return 0;
}