#include <iostream>
#include <fstream>
#include <string.h>
#define nmax 2000000
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char cuv[nmax+5],text[nmax+5];
int lps[nmax+5],poz[1005],m,n,nr;
void prelps()
{
    int i=0,j=-1;
    lps[0]=-1;
    while(i<m)
    {
        while(j>=0 && cuv[i]!=cuv[j])
            j=lps[j];
        i++;
        j++;
        lps[i]=j;
    }
}
int main()
{
    fin>>cuv>>text;
    m=strlen(cuv);
    n=strlen(text);
    prelps();
    int i=0,j=0;
    while(i<n)
    {
        while(j>=0 && cuv[j]!=text[i])
            j=lps[j];
        j++;
        i++;
        if(j==m)
        {
            j=lps[j];
            nr++;
            if(nr<=1000)
                poz[nr]=i-m;
        }
    }
    fout<<nr<<"\n";
    if(nr>1000)
        nr=1000;
    for(int i=1;i<=nr;i++)
        fout<<poz[i]<<" ";
    return 0;
}