#include <fstream>
#include <string.h>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char A[2000002],B[2000002];
int h1,h2,g1,g2,p1,p2,i,c,poz[2000002],n,m,M1,M2,baza;
int main()
{
    baza=79;
    M1=99991;
    M2=99989;
    fin>>A>>B;
    n=strlen(A);
    m=strlen(B);
    if(n>m)
    {
        fout<<0;
        return 0;
    }
    h1=0;
    h2=0;
    for(i=0;i<=n-1;i++)
    {
        h1=(h1*baza+A[i])%M1;
        h2=(h2*baza+A[i])%M2;
    }
    p1=1;
    p2=1;
    for(i=1;i<=n-1;i++)
    {
        p1=(p1*baza)%M1;
        p2=(p2*baza)%M2;
    }
    c=0;
    g1=0;
    g2=0;
    for(i=0;i<=n-1;i++)
    {
        g1=(g1*baza+B[i])%M1;
        g2=(g2*baza+B[i])%M2;
    }
    if(h1==g1 && h2==g2)
    {
        c++;
        poz[c]=0;
    }
    for(i=1;i+n-1<=m-1;i++)
    {
        //sterg din g1 si g2 pe B[i-1]
        //apoi adaugam in g1 si g2 B[i+n-1]
        g1=(((g1-B[i-1]*p1%M1+M1)%M1)*baza+B[i+n-1])%M1;
        g2=(((g2-B[i-1]*p2%M2+M2)%M2)*baza+B[i+n-1])%M2;
        if(h1==g1 && h2==g2)
        {
            c++;
            poz[c]=i;
        }
    }
    fout<<c<<'\n';
    for(i=1;i<=c;i++)
    {
        fout<<poz[i]<<" ";
    }

    return 0;
}