#include <fstream>
#include <cstring>
#define DIM 2000011
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
int n,m,nr,L;
int sol[1011],P[DIM];
char A[DIM],B[DIM];

int main(void){
    register int i,j;

    f>>A+1>>B+1;
    n=strlen(A+1);
    m=strlen(B+1);

    L=0,P[1]=0;
    for(i=2;i<=n;i++){
        while(L && A[i]!=A[L+1]) L=P[L];
        if(A[i]==A[L+1]) L++;
        P[i]=L;
    }

    L=0;
    for(i=1;i<=m;i++){
        while(L && B[i]!=A[L+1]) L=P[L];
        if(B[i]==A[L+1]) L++;
        if(L==n){
            nr++;
            if(nr<=1000)
                sol[nr]=i-L;
        }
    }

    g<<nr<<"\n";
    nr=min(nr,1000);
    for(i=1;i<=nr;i++) g<<sol[i]<<" ";
    f.close();
    g.close();
    return 0;
}