#include <iostream>
#include<fstream>
#include<vector>
#include<cstring>
using namespace std;
int p[2000100],d[2000100],k,i,m,n,nr;
char a[2000100],b[2000100];
vector<int>s;
int main()
{
    ifstream f("strmatch.in");
    f>>(a+1)>>(b+1);
    f.close();
    n=strlen(a+1);m=strlen(b+1);
    k=0;p[1]=0;
    for(i=2;i<=n;++i)
    {
        while(k>0&&a[k+1]!=a[i])k=p[k];
        if(a[k+1]==a[i])++k;
        p[i]=k;
    }
    k=0;nr=0;--n;++m;
    for(i=1;i<m;++i)
    {
        while(k>0&&a[k+1]!=b[i])k=p[k];
        if(a[k+1]==b[i])++k;
        d[i]=k;
        if(k>n)
        {
            s.push_back(i);
        }
    }
    k=s.size();
    ofstream g("strmatch.out");
    g<<k<<'\n';
    k=min(1000,k);
    for(i=1;i<k;++i)
        {
            nr=s[i]-n-1;g<<nr<<" ";
        }
    g.close();
    return 0;
}