#include<fstream>
#include<cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int N,M,i,t1,t2,e1,e2,h1,h2,k;
char A[2000010],B[2000010];
int v[1010];
int main(){
    fin>>A>>B;
    N=strlen(A);
    M=strlen(B);
    e1=e2=1;
    for(i=0;i<N;i++){
        h1=(h1*27+A[i])%100009;
        h2=(h2*29+A[i])%666013;
        if(i!=0){
            e1=(e1*27)%100009;
            e2=(e2*29)%666013;
        }
    }
    if(N>M){
        fout<<"0";
        return 0;
    }
    for(i=0;i<N;i++){
        t1=(t1*27+B[i])%100009;
        t2=(t2*29+B[i])%666013;
    }
    if(t1==h1&&t2==h2)
        v[++k]=0;
    for(i=N;i<M;i++){
        t1=((t1-(B[i-N]*e1)%100009+100009)*27+B[i])%100009;
        t2=((t2-(B[i-N]*e2)%666013+666013)*29+B[i])%666013;
        if(t1==h1&&t2==h2){
            k++;
            if(k<=1000)
                v[k]=i-N+1;
        }
    }
    fout<<k<<"\n";
    for(i=1;i<=1000&&i<=k;i++)
        fout<<v[i]<<" ";
    return 0;
}