#include <fstream>
#include <cstring>
using namespace std;
char c[2000005],a[2000005];
int i,k,p[2000005],nr,n,m,l,sol[2000005];
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int main()
{
    fin>>c+1;
    fin>>a+1;
    n=strlen(c+1);
    m=strlen(a+1);
    k=0;
    for(i=2;i<=n;i++)
    {
        for(;k!=0&&c[k+1]!=c[i];) k=p[k];
        if(c[k+1]==c[i]) k++;
        p[i]=k;
    }
    k=0;
    for(i=1;i<=m;i++)
    {
        for(;k!=0&&c[k+1]!=a[i];) k=p[k];
        if(c[k+1]==a[i]) k++;
        if(k==n) {nr++;++l;sol[l]=i-n;}
    }
    fout<<nr<<'\n';
    for(i=1;i<=min(l,1000);i++) fout<<sol[i]<<" ";
    return 0;
}