#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char x[2000005],y[2000005];
int i,j,k,pi[2000005],nr,q,v[1001],M,N;
int main()
{
    fin.getline(x,2000005);
    fin.getline(y,2000005);
    M=strlen(x);
    N=strlen(y);
    for (i = M; i; --i) x[i] = x[i-1];
    x[0] = ' ';
    for (i = N; i; --i) y[i] = y[i-1];
    y[0] = ' ';
    k=0;
    pi[1]=0;
    for(i=2; i<=M; i++)
    {
        while(k>0 && x[i]!=x[k+1]) k=pi[k];
        if(x[k+1]==x[i]) k++;
        pi[i]=k;
    }
    k=0;
    for(i=1; i<=N; i++)
    {
        while(k>0 && y[i]!=x[k+1]) k=pi[k];
        if(y[i]==x[k+1]) k++;
        if(k==M)
        {
            k=pi[M];
            nr++;
            q++;
            if(q<=1000) v[q]=i-M;
        }
    }
    fout<<nr<<'\n';
    if(q>1000) q=1000;
    for(i=1; i<=q; i++) fout<<v[i]<<" ";
    return 0;
}