#include <fstream.h>
#include <string.h>
#define nmax 2000001
char A[nmax],B[nmax];
int p[nmax],sol[1001],nr;

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

f>>A;
f>>B;
int n,m,i;
n=strlen(A);
for(i=n;i>=0;i--)A[i]=A[i-1];
m=strlen(B);
for(i=m;i>=0;i--)B[i]=B[i-1];
p[1]=0;
int k=0;
for(i=2;i<=n;i++)
	{
	while (k>0 && A[k+1]!=A[i])k=p[k];
	if (A[k+1]==A[i])k++;
	p[i]=k;
	}
k=0;
for (i=1;i<=m;i++)
	{
	while (k>0 && A[k+1]!=B[i])k=p[k];
	if(A[k+1]==B[i])k++;
	if(k==n)
		{
		nr++;
		if(nr<=1000)sol[nr]=i-n;
		k=p[k];
		}
	}
g<<nr<<'\n';
if (nr>1000)nr=1000;
for (i=1;i<=nr;i++)
	g<<sol[i]<<" ";
}