#include <bits/stdc++.h>
using namespace std;
ifstream fi("strmatch.in");
ofstream fo("strmatch.out");

const int NMAX = 2e6 + 5;
const int MOD1 = 1e9 + 6;
const int SIGMA = 63;

char pat[NMAX], A[NMAX];
int m, n;
int codPat, codSir;

int codCaracter(char x) {
    if ('A' <= x && x <= 'Z')
        return x - 'A' + 1;
    else if ('a' <= x && x <= 'z')
        return x - 'a' + 26 + 1;
    else
        return x - '0' + 26 + 26 + 1;
}

int main()
{
    fi >> pat + 1 >> A + 1;
    m = strlen(pat + 1);
    n = strlen(A + 1);

    codPat = 0;
    for (int i = 1; i <= m; i++) {
        codPat = (1LL * codPat * SIGMA + codCaracter(pat[i])) % MOD1;
    }

    vector <int> ans;
    codSir = 0;
    for (int i = 1; i <= m; i++) {
        codSir = (1LL * codSir * SIGMA + codCaracter(A[i])) % MOD1;
    }

    int putere = 1;
    for (int i = 1; i <= m - 1; i++)
        putere = 1LL * putere * SIGMA % MOD1;

    for (int i = m + 1; i <= n; i++) {

        if (codPat == codSir) {
            ans.push_back(i - m - 1);
        }
        codSir = ((long long)codSir - 1LL * putere * codCaracter(A[i - m]) + 100LL * MOD1) % MOD1;

        codSir = (1LL * codSir * SIGMA + codCaracter(A[i])) % MOD1;

    }
    if (codPat == codSir) {
        ans.push_back(n - m);
    }

    fo << ans.size() << "\n";
    for (int i = 0; i < min((int)ans.size(), 1000); i++)
        fo << ans[i] << " ";


    return 0;
}