#include <fstream>
#include <cstring>
using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

long n,m,i,pi[2000003],nr,sav[1005];
char A[2000003],B[2000003];
void prefix()
{
    long k=0;
    pi[1]=0;
    for (i=2;i<=n;i++)
    {
        while (k>0 && A[k+1]!=A[i])
            k=pi[k];
        if (A[k+1]==A[i])
            k++;
        pi[i]=k;
    }
}

int main()
{
    f>>A+1>>B+1;
    n=strlen(A+1);
    m=strlen(B+1);
    prefix();
    long k=0;
    for (i=1;i<=m;i++)
    {
        while (k>0 && A[k+1]!=B[i])
            k=pi[k];
        if (A[k+1]==B[i])
            k++;
        if (k==n)
        {
            nr++;
            if (nr<=1000)
                sav[nr]=i-n;
        }
    }

    g<<nr<<'\n';
    long mn;
    mn=nr;
    if (mn>1000)
        mn=1000;
    for (i=1;i<=mn;i++)
        g<<sav[i]<<' ';
    return 0;
}