#include <fstream>
#include <cstring>
#define NMAX 2000003
using namespace std;

char a[NMAX], b[NMAX];
int n, m, sol[NMAX], k;
const int mod=50331653;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

inline bool Verific(const int &k)
{   int i;
    for (i=0; i<m; ++i)
        if (b[i]!=a[i+k])
            return 0;
    return 1;
}

int main()
{   f.getline(b, NMAX);
    f.get(a, NMAX);
    n=strlen(a);
    m=strlen(b);
    long long h1=0, h2=0;
    int i;
    for (i=0; i<m; ++i)
    {   h1=(h1+a[i])%mod;
        h2=(h2+b[i])%mod;
    }
    for (i=0; i<=n-m; ++i)
    {   if (h1==h2 && Verific(i))
        {   ++k;
            if (k<=1000)
                sol[k]=i;
        }
        h1=(h1-a[i]+a[i+m])%mod;
    }
    g<<k<<'\n';
    for (i=1; i<=min(k, 1000); ++i)
        g<<sol[i]<<' ';
    return 0;
}