#include <iostream>
#include <fstream>
#include <vector>
#include <string.h>
#define DIM 2000005

using namespace std;

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

char A[DIM], B[DIM];
int lps[DIM];
vector <int> sol;

void preprocessing(char p[]){
    int i=1, len=0, lsup = strlen(p);
    lps[0] = 0;
    while(i < lsup){
        while(p[i] != p[len] && len > 0)
            len = lps[len-1];
        if(p[i] == p[len]){
            len++;
            lps[i] = len;
        }
        else
            lps[i] = 0;
        i++;
    }
}

void KMP(char pattern[], char s[]){
    int ip=0, is=0, target = strlen(pattern), lsup = strlen(s);
    int contor = 0;
    while(is < lsup)
    {
        while(pattern[ip] != s[is] && ip > 0)
            ip = lps[ip-1];
        if(pattern[ip] == s[is])
            ip++;
        if(ip == target){
            contor++;
            if(contor <= 1000)
                sol.push_back(is-ip+1);
            ip = lps[ip-1];
        }
        is++;
    }
}

void afisare(vector <int> v){
    int l = v.size();
    g<<l<<"\n";
    for(int i=0; i<l; i++)
        g<<v[i]<<" ";
}

int main()
{
    f>>A>>B;
    preprocessing(A);
    KMP(A,B);
    afisare(sol);
}