#include <bits/stdc++.h>

using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
string s1,s2,s3;
int urm[4000005],j,k,q=0,sol[3005],i;
int main()
{
    f>>s1;
    f>>s2;
    s3=s1+"#"+s2;
    urm[0]=0;
    k=0;
    for (j=1;j<s3.size();j++)
    {
        while (k>0&&s3[j]!=s3[k])
               {
                   k=urm[k-1];
               }
        if (s3[j]==s3[k])
        {
            k++;
        }
        urm[j]=k;
        if (urm[j]==s1.size())
        {
            if (q<1000)
            {
                sol[++q]=j-2*s1.size();
            }
        }
    }
    g<<q<<'\n';
    for (i=1;i<=min(q,1000);i++)
    {
        g<<sol[i]<<" ";
    }
    return 0;
}