# include <fstream>
# include <cstring>
# define DIM 2000010
# define BAZA1 53
# define BAZA2 103
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char a[DIM],b[DIM];
int sol[1002],n,m,i,nr;
unsigned long long p1[DIM],p2[DIM],vala1,vala2,valb1,valb2;
int cod(char c){
    if(c>='A'&&c<='Z')
        return 26+c-'A';
    else
        return c-'a';
}
int main () {
    fin>>a+1>>b+1;
    n=strlen(a+1);
    m=strlen(b+1);
    p1[0]=1;
    for(i=1;i<=n;i++)
        p1[i]=p1[i-1]*BAZA1;
    p2[0]=1;
    for(i=1;i<=n;i++)
        p2[i]=p2[i-1]*BAZA2;
    for(i=1;i<=n;i++){
        vala1=vala1*BAZA1+cod(a[i]);
        vala2=vala2*BAZA2+cod(a[i]);
    }
    for(i=1;i<=n;i++){
        valb1=valb1*BAZA1+cod(b[i]);
        valb2=valb2*BAZA2+cod(b[i]);
    }
    if(vala1==valb1&&vala2==valb2){
        nr++;
        if(nr<=1000)
            sol[nr]=0;
    }
    for(;i<=m;i++){
        valb1-=p1[n-1]*cod(b[i-n]);
        valb1=valb1*BAZA1+cod(b[i]);
        valb2-=p2[n-1]*cod(b[i-n]);
        valb2=valb2*BAZA2+cod(b[i]);
        if(vala1==valb1&&vala2==valb2){
            nr++;
            if(nr<=1000)
                sol[nr]=i-n;
        }
    }
    fout<<nr<<"\n";
    for(i=1;i<=min(nr,1000);i++)
        fout<<sol[i]<<" ";
    return 0;
}