#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char A[2000005],B[2000005];
int nr,n,m,z[1005],i;
int main(){
    fin>>A>>B; n=strlen(A); m=strlen(B);
    nr=0;
    for(i=0;i<=m-n;i++){
        if(strncmp(A,B+i,n)==0){
            nr++;
            if(nr<=1000){
                z[nr]=i;
            }
        }
    }
    fout<<nr<<"\n";
    for(i=1;i<=nr && i<=1000;i++){
        fout<<z[i]<<" ";
    }
    fout.close();
    fin.close();
    return 0;
}