#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;
#define MaxL 2000000

int p[MaxL*2+2];
char t[MaxL];
int main()
{
    ifstream in("strmatch.in");
    ofstream out("strmatch.out");
    int i, n, res, k=0, cnt=0, cnt2=0;
    string s, t;
    char ch;
    in>>s;
    cnt=s.size();
    in>>t;
    s=s+'*'+t;
    for(i=1; i<s.size(); i++)
    {
        while(k!=0 && s[k]!=s[i])
        {
            k=p[k-1];

        }
        if(s[k]==s[i]){k++;}
        p[i]=k;
         if(p[i]==cnt)
        {
            cnt2++;
        }


    }
    out<<cnt2<<'\n';
    cnt2=0;
    for(i=1; i<s.size(); i++)
    {
        if(p[i]==cnt)
        {
            cnt2++;
            if(cnt2<=1000)
            out<<i-2*cnt<<" ";
            else break;

        }
    }
    return 0;
}