#include <fstream>
#include <cstring>
#define dim  2000005
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int n,i,j,l,v[dim],p[dim],nr,m,x;
char a[dim],b[dim];
int main(){
    fin>>a+1;
    n=strlen(a+1);
    fin>>b+1;
    m=strlen(b+1);
    for(i=2;i<=n;i++){
        while(l!=0 && a[i]!=a[l+1]){
            l=p[l];

        }
        if(a[i]==a[l+1]){
            l++;
        }
        p[i]=l;
    }
    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++;
            l=p[l];
            v[++x]=i-n;
        }
    }
    fout<<nr<<"\n";
    for(i=1;i<=x;i++){
        fout<<v[i]<<" ";
    }



    return 0;
}