#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int n,i,l1,l2,m,p[2000005],v[2000005],nr,x;
char A[2000005],B[2000005];
int main(){
    fin>>A+1;
    n=strlen(A+1);
    fin>>B+1;
    m=strlen(B+1);
    l1=0;p[1]=0;
    for(i=2;i<=n;i++){
        while(l1!=0 && A[i]!=A[l1+1]){
            l1=p[l1];
        }
        if(A[i]==A[l1+1]){
            l1++;
        }
        p[i]=l1;
    }
    for(i=1;i<=m;i++){
        while(l2!=0 && B[i]!=A[l2+1]){
            l2=p[l2];
        }
        if(B[i]==A[l2+1]){
            l2++;
        }
        if(l2==n){
            nr++;
            l2=p[l2];
            v[++x]=i-n;
        }
    }
    fout<<nr<<"\n";
    for(i=1;i<=x;i++){
        fout<<v[i]<<" ";
    }


    return 0;
}