#include <fstream>
#include <cstring>

using namespace std;

int l[2000005];
char a[2000005], b[2000005];
int sir[2000005];
int contor=0;
int  la, lb;

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

    fin >> a >> b;
    la = strlen(a);
    lb = strlen(b);

    l[0] = 0;
    int i=1, j=0;

    while(i<la)
    {
        if(a[i] == a[j])
        {
            j++;
            l[i] = j;
            i++;
        }
        else
        {
            if(j==0)
                l[i++]=0;
            else
                j=l[j-1];

        }
    }

    i=0; j=0;
    while(i<lb)
    {
        if(b[i] == a[j])
        {
            i++;
            j++;
            if(j==la)
            {
                sir[contor++] = i-la;
                j=l[j-1];
            }
        }
        else
        {
            if(j==0)
                i++;
            else
                j = l[j-1];
        }
    }

    fout << contor  << "\n";
    for(i=0; i<contor; i++)
    {
        fout << sir[i] << " ";
    }
    return 0;

}