#include<fstream>
#include<iostream>
#include<cstring>
#include<vector>
#define N 2000001
using namespace std;
char s[N],sir[N];
int prefix[N];
void calcul_prefix(char s[]){
	int n=strlen(s),i,j;
	int a[n][n];
	prefix[0]=-1;
	for(i=1;i<n;i++){
		j=prefix[i-1];
		if(s[i]==s[j+1])
			prefix[i]=j+1;
		else{
			while(j>=0 && s[i]!=s[j+1])
				j=prefix[j];
			if(s[i]==s[j+1])
				prefix[i]=j+1;
			else
				prefix[i]=-1; //=j	
			/*
			if(s[i]==s[j+1])
				j++;
			prefix[i]=j;	
			*/
		}	
	}
	 
}

int main(){
	 
	ifstream f("strmatch.in");
	ofstream g("strmatch.out");
	f.getline(s,N);
	f.getline(sir,N);
	calcul_prefix(s);
	int m=strlen(s);
	int n=strlen(sir);
	int i=0,j=-1,nr=0;
	vector<int> poz;
	while(i<n){
		//cout<<j;
		if(sir[i]==s[j+1]){
			j++;
			if(j+1==m){
		
				nr++;
				poz.push_back(i-m+1);
				//j=-1;
			}
			i++;
		}
		else{
		
			while(j>=0 && sir[i]!=s[j+1])
				j=prefix[j];
			if(j==-1)
				i++;
		}
	}
		
			
	
	g<<nr<<endl;
	for(i=0;i<poz.size();i++)
		g<<poz[i]<<" ";
	g.close();
	
}