#include <fstream>
#include <string>
#include <iostream>
using namespace std;
ifstream mama("strmatch.in");
ofstream tata("strmatch.out");
string P,T;
int n,m,l,v[2000001],x[2000001];
void prefix()
{
for(int i=2,k=0;i<=m;i++)
{
while(k>0 and P[k+1]!=P[i])
k=v[k];
if(P[k+1]==P[i]) k++;
v[i]=k;
}
}
void KMP()
{
prefix();
for(int i=1,q=0;i<=n;i++)
{
while(q and P[q+1]!=T[i])
q=v[q];
if(P[q+1]==T[i]) q++;
if(q==m) {
l++;
if(l<=1000) x[l]=i-m;
q=v[q];
}
}
}
int main()
{
mama>>P>>T;
m=P.size();
n=T.size();
P=" "+ P;
T=" "+ T;
KMP();
int i=1;
tata<<l<<'\n';
if(l<=1000)
{
for(int i=1;i<=l;i++)
tata<<x[i]<<" ";
}
else
{
for(int i=1;i<=1000;i++)
tata<<x[i]<<" ";
}
return 0;
}