#include <fstream>
#include <cstring>
#define LungimeMaxima 2000001

using namespace std;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

char pattern[LungimeMaxima];
char text[LungimeMaxima];
char lps[LungimeMaxima];
int nr;
int potrivire[100000];

void CreareLps(int Lungime)
{
    int i = 1;
    int len = 0;
    lps[0] = 0;
    while (i < Lungime)
    {
        if (pattern[i] == pattern[len])
        {
            len++;
            lps[i] = len;
            i++;
        }
        else
        {
            if (len == 0)
            {
                lps[i] = 0;
                i++;
            }
            else len = lps[len - 1];
        }
    }
}

void KMP()
{
    int i = 0;
    int j = 0;
    int n = strlen(text);
    int m = strlen(pattern);
    CreareLps(m);
    while (i < n )
    {
        if (pattern[j] == text[i])
        {
            i++;
            j++;
        }
        if (j == m)
        {
            nr++;
            potrivire[nr] = i - j;
            j = lps[j-1];
        }
        else if (i < n && pattern[j] != text[i])
        {
            if (j == 0)
            {
                i++;
            }
            else j = lps[j - 1];
        }
    }
}

void afisare()
{
    fout << nr << "\n";
    for (int i = 1; i <= nr; i++)
        fout << potrivire[i] << " ";
}

int main()
{
    fin.getline(pattern,LungimeMaxima-1);
    fin.getline(text,LungimeMaxima-1);
    KMP();
    afisare();
    return 0;
}