#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char a[2000002], b[2000002];
int v[1001], p[2000002];
int main()
{
    int n, m, i, nr=0, l=0;
    fin>>a+1;
    fin>>b+1;
    n=strlen(a+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;
    }
    l=0;
    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++;
            if(nr<=1000)
            {
                v[nr]=i-n;
            }
            l=p[l];
        }
    }
    fout<<nr<<"\n";
    for(i=1;i<=min(1000, nr);i++)
    {
        fout<<v[i]<<" ";
    }

}