#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char a[2000010], b[2000010];
int lps[2000010], rez[1009];
int main()
{
    int n, m, L, sol=0, i;
    fin>>a+1>>b+1;
    n=strlen(a+1);
    m=strlen(b+1);
    L=0;
    lps[1]=0;
    for(i=2;i<=n;i++)
    {
        while(L!=0&&a[i]!=a[L+1])
        {
            L=lps[L];
        }
        if(a[i]==a[L+1])
        {
            L++;
        }
        lps[i]=L;
    }
    L=0;
    for(i=1;i<=m;i++)
    {
        while(L!=0&&b[i]!=a[L+1])
        {
            L=lps[L];
        }
        if(b[i]==a[L+1])
        {
            L++;
        }
        if(L==n)
        {
            sol++;
            if(sol<1000)
            {
                rez[sol]=i-n;
            }
            L=lps[L];
        }
    }
    fout<<sol<<"\n";
    if(sol>1000)
    {
        sol=1000;
    }
    for(i=1;i<=sol;i++)
    {
        fout<<rez[i]<<" ";
    }
    return 0;
}