#include<iostream>
#include<fstream>
#include<string.h>
#include<algorithm>

#define maxn 2000010
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
char T[maxn],P[maxn];
int urm[maxn],n,m,sol[maxn],nrs;
void Urmator(char P[maxn]){
	int k=0;
	for(int i=2;i<=m;i++){
		while(k>0 && P[k+1]!=P[i])
			k=urm[k];
		if(P[k+1]==P[i])
			k++;
		urm[i]=k;
	}
}
int main (){
	f.getline(P,maxn);
	f.getline(T,maxn);
	m=strlen(P);
	n=strlen(T);
	for(int i=n;i>0;i--)
		T[i]=T[i-1];
	T[0]=' ';
	for(int i=m;i>0;i--)
		P[i]=P[i-1];
	P[0]=' ';
	Urmator(P);
	int x=0;
	for(int i=1;i<=n;i++){
		while(x>0 && P[x+1]!=T[i])
			x=urm[x];
		if(P[x+1]==T[i])
			x++;
		if(x==m){
			nrs++;
			sol[nrs]=i-m;
			urm[i]=x;
		}
	}
	g<<min(1000,nrs)<<endl;
	for(int i=1;i<=min(1000,nrs);i++)
		g<<sol[i]<<" ";
	return 0;
}