#include<fstream>
#include<cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int n,m,i,L,nr;
char a[1200001],b[1200001];
int p[2000001],s[1010];
int main(){
    fin>>a+1;
    n=strlen(a+1);
    L=0;
    for(i=2;i<=n;i++){
        while(a[i]!=a[L+1] && L!=0)
            L=p[L];
        if(a[i]==a[L+1])
            L++;
        p[i]=L;
    }
    fin>>b+1;
    m=strlen(b+1);
    L=0;
    for(i=1;i<=m;i++){
        while(L!=0 && b[i]!=a[L+1])
            L=p[L];
        if(b[i]==a[L+1])
            L++;
        if(L==n){
            nr++;
            s[nr]=i-n;
        }
    }
    fout<<nr<<"\n";
    if(nr>1000)
        nr=1000;
    for(i=1;i<=nr;i++)
        fout<<s[i]<<" ";
    return 0;
}