#include <fstream>
#include <string.h>
#define NMAX 2000001

using namespace std;

int Urm[NMAX];
char T[NMAX], P[NMAX];
int n, m, nrez, rez[1001];

void prefix(char *P){
	int k=-1, x;
	Urm[0]=-1;
	for(x=1; x<m; x++){
		while(k>=0 && P[k+1]!=P[x]) k=Urm[k];
		if(P[k+1]==P[x]) k++;
		Urm[x]=k;
	}
}

int main(){
	int i, x=-1;
	ifstream f("strmatch.in");
	ofstream g("strmatch.out");
	f.getline(P, NMAX);
	f.getline(T, NMAX);
	n=strlen(T); m=strlen(P);
	prefix(P);
	for(i=0; i<n; i++){
		while(x>=0 && P[x+1]!=T[i]) x=Urm[x];
		if(P[x+1]==T[i]) x++;
		if(x==m-1){
			if(nrez<1000)rez[nrez++]=i-m+1;
			else nrez++;
			x=Urm[x];
		}
	}
	g<<nrez<<"\n";
	if(nrez>1000) nrez=1000;
	for(i=0; i<nrez; i++)
		g<<rez[i]<<" ";
	return 0;
}