#include <fstream>
#include <cstring>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
char a[2000005],b[2000005];
int lga,lgb,i,p[2000005],pos,n,x,t[1005];
int main()
{
    f>>(a+1)>>(b+1);
    lga=strlen(a+1);
    lgb=strlen(b+1);
    x=0;
    for (i = 2; i <= lga; ++i)
    {
        while (x && a[x+1] != a[i])
            x = p[x];
        if (a[x+1] == a[i])
            ++x;
        p[i] = x;
    }
  // g<<p[3];
x=0;
for(i=1;i<=lgb;i++)
{  while (x && a[x+1] != b[i])
            x = p[x];
     if (a[x+1] == b[i])
            ++x;
    if(x==lga){ x=p[lga];
        n++;
        if (n <= 1000)
                t[n] = i-lga;
    }
}
g<<n<<'\n';
for(i=1;i<=n;i++)
    g<<t[i]<<" ";

}