#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
char s1[2000007],s[2000007];
int urm[2000007],n1,q,i,n,k,rasp[2000007];
int f1(int q)
{
    while (q>1)
    {
        q=urm[q-1];
        if (s1[i]==s1[q])
            return q+1;
    }
    return q;
}
int main(void)
{
    FILE * f;
    f=fopen("strmatch.in","r");
    ofstream g("strmatch.out");
    fgets(s1,2000005,f);
    fgets(s,2000005,f);
    n1=strlen(s1)-1;
    q=0;
    for (i=1;i<n1;i++)
    {
        if (s1[i]==s1[q])
            q++;
        else
            q=f1(q);
        if (q<=1)
        {
            if (s1[i]==s1[0])
                q=1;
            else
                q=0;
        }
        urm[i]=q;
    }
    n=strlen(s)-1;
    q=0;
    for (i=0;i<n;i++)
    {
        while ((s[i]!=s1[q])&&(q>0))
            q=urm[q-1];
        if (q==0)
            while (s[i]!=s1[0])
                i++;
        q++;
        if (q==n1)
        {
            k++;
            rasp[k]=i-n1+1;
        }
    }
    g<<k<<'\n';
    for (i=1;i<=k;i++)
        g<<rasp[i]<<' ';
    g.close();
    return 0;
}