#include <stdio.h>
#include <string>
#include <fstream>
#define MOD 1000000001
#define BASE 131
#define easyT 1
#define RollT 2

using namespace std;

string Str, subStr;
int sL, subL;
long long hashSubS, hashS;
int nr, Sol[1001];

void read_() {
     ifstream fin("strmatch.in");
     fin >> subStr;
     fin >> Str;  
     sL = Str.length(); 
     subL = subStr.length();  
     fin.close();
}

void search(int i) {
     if (hashSubS == hashS) {
         if (nr < 1000) {
             Sol[nr] = i - subL + 1;               
         }
         nr++;   
     }     
}

void get_Rolling_Hash() {         
     for (int i = 0; i < subL; i++) {  
         hashS = (hashS * BASE + Str[i]) % MOD;           
         hashSubS = (hashSubS * BASE + subStr[i]) % MOD;
     }
     
     long long pw = 1;
     for (int i = 0; i < subL; i++) {
         pw = (pw * BASE) % MOD; 
     }
     
     search(subL - 1);     
     for (int i = subL; i < sL; i++) {
         hashS = ((hashS * BASE + Str[i])  - (pw * Str[i - subL])) % MOD;
         if (hashS < 0) {
             hashS += MOD;            
         }
         search(i);
     }       
}

void printSol() {
     printf("%d\n", nr);
     if (nr > 1000) {
         nr = 1000;   
     }
     for (int i = 0; i < nr; i++) {
         printf("%d ", Sol[i]);
     }          
}

int main(){
    freopen("strmatch.out", "w", stdout);
    
    read_();    
    get_Rolling_Hash();
    printSol();
    
    return 0;
}