#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

const int MAX = 2000005;
int lps[MAX];

int main()
{
    string s1,s2;
    int len,i,j,len2;
    vector<int> ans;

    fstream f("strmatch.in",ios::in);
    ofstream g("strmatch.out");
    f>>s1>>s2;

    len = s1.length();
    len2 = s2.length();

    lps[0] = 0;

    j=0;

    for(i=1;i<len;++i)
        {
          while(j>0 && s1[i-1]!=s1[j])
            {
            j = lps[j];
            }
          if(s1[i-1] == s1[j])
            {
            ++j;
            }
            lps[i] = j;
        }

    i = j = 0;

    for(i=0;i<len2;++i)
        {
        while(j>0 && s1[j]!=s2[i])
            {
            j = lps[j-1];
            }
        if(s1[j]==s2[i])
            ++j;
        if(j==len)
            {
            ans.push_back(i-j+1);
            }
        }

    len = ans.size();
    g<<len<<"\n";

    for(i=0;i<len && i<1000;++i)
        {
        g<<ans[i]<<" ";
        }

    return 0;
}