#include <fstream>
#include <cstring>
#define Xp 2000013
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
int lung,lun,k,i,n,P[Xp],Pos[Xp];
char a[Xp],b[Xp];
int main()
{
    f>>(b+1);
    lung=strlen(b+1);
    for(i=2;i<=lung;++i)
    {
        while(k&&b[k+1]!=b[i]) k=P[k];
        if(b[k+1]==b[i]) ++k;
        P[i]=k;
    }
    f>>(a+1);
    lun=strlen(a+1);
    k=0;
    for(i=1;i<=lun;++i)
    {
        while(k&&b[k+1]!=a[i]) k=P[k];
        if(b[k+1]==a[i]) ++k;
        if(k==lung)
        {
            k=P[lung];
            ++n;
            if(n<=1000) Pos[n]=i-lung;
        }
    }
    g<<n<<'\n';
    for(i=1;i<=min(1000,n);++i) g<<Pos[i]<<" ";
    return 0;
}