#include <iostream>
#include <cstdio>
#include <string>
#include <vector>

using namespace std;
string pat,txt;
int lp[2000000];
int i,j,l,lt;
vector <int> poz;
int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    getline(cin,pat);
    getline(cin,txt);
    ///cautare lungimi pattern
    {
        l=pat.length();
        j=0, i=1;
        while(i<l)
        {
            if(pat[i]==pat[j])
                lp[i++]=++j;
            else
            {
                if(j!=0)
                    j=lp[j-1];
                else
                    lp[i++]=0;
            }
        }
    }
    ///potrivire text
    {
        lt=txt.length();
        i=0,j=0;
        while(i<lt)
        {
            if(pat[j]==txt[i])
                ++i, ++j;
            if(j==l)
            {
                poz.push_back(i-l);
                j=lp[j-1];
            }
            else if(i<lt && pat[j]!=txt[i])
            {
                if(j>0)
                    j=lp[j-1];
                else
                    ++i;
            }
        }
    }
    ///afisare
    {
        l=poz.size();
        cout<<l<<"\n";
        for(i=0;i<l;i++)
            cout<<poz[i]<<" ";
    }
    return 0;
}