#include <fstream>
#include <cstring>
using namespace std;
ifstream in("strmatch.in");
ofstream out("strmatch.out");
int pi[2000005],nr,v[1005];
char a[2000005],b[2000005];
int main()
{
    in>>a>>b;
    int n=strlen(a),k=0;
    pi[0]=0;
    for(int i=1; i<n; ++i)
    {
        while(k>-1 && a[k+1]!=a[i])
            k=pi[k];
        if(a[k+1]==a[i])
            ++k;
        pi[i]=k;
    }
    int m=strlen(b),q=-1;
    for(int i=0; i<m; ++i)
    {
        while(q>-1 && a[q+1]!=b[i])
            q=pi[q];
        if(a[q+1]==b[i])
            ++q;
        if(q==n-1)
        {
            q=pi[n-1];
            ++nr;
            if(nr<=1000)
                v[nr]=i-n+1;
        }
    }
    out<<nr<<"\n";
    int lo=min(nr,1000);
    for(int i=1; i<=lo; ++i)
        out<<v[i]<<" ";
}


/*



n=5
abacd

p[1]=0;
for(i=2;i<=n;++i)
{
        while(k>0 && a[k+1]!=a[i])
            k=pi[k];
        if(a[k+1]==a[i]
           ++k;
           pi[i]=k;
}

*/