// infoarena: problema/strmatch //
#include <fstream>
#include <cstring>
#include <vector>
using namespace std;

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

const int MOD = 666013;
const int MAXN = 2000010;
const int B = 383;

char c,a[MAXN],b[MAXN];
int n,m,hb,h,i,x;

vector<int> sol;

void verifica(int i)
{
	int k;
	for(k=0; k<m; k++)
		if(a[k+i] != b[k])
			return;
	sol.push_back(i);
}

int main()
{
	in>>b;
	m = strlen(b);	
	in>>a;
	n = strlen(a);
	
	h = hb = 0;
	x=1;
	for(i=1; i<m; i++)
		x = (x*B)%MOD;
	
	for(i=0; i<m; i++)
	{
		hb = (B*hb + b[i])%MOD;
		h = (B*h + a[i])%MOD;
	}
	if(hb == h)
		verifica(0);
	
	for(i=1; i<=n-m+1; i++)
	{
		h = (((h - (x*a[i-1])%MOD + MOD)*B)%MOD + a[i+m-1])%MOD;
		if(h == hb)
			verifica(i);
	}

	out<<sol.size()<<'\n';
	for(i=0; i<sol.size(); i++)
		out<<sol[i]<<' ';
	
	return 0;
}