#include <bits/stdc++.h>
#pragma GCC optimize("O3")

#define input "strmatch.in"
#define output "strmatch.out"

const int lMax = 2000003;

using namespace std;

string a, b;
int x, s[lMax], p, k;

main()
{
    freopen(input, "rt", stdin);
    freopen(output, "wt", stdout);

    cin >> a >> b;
    for ( ;p = b.find(a, p) + 1; s[x++]=p-1);
    cout<<x<<'\n';

    k = min (x, 1001);
    for( ;p < k; cout << s[p++]<<' ');

    return 0;
}