#include <bits/stdc++.h>

using namespace std;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
#define cin fin
#define cout fout

#define N 2000005
char a[N], b[N];
int la, lb, nr, i, j, len, lps[N], rez[1005];

int main()
{
    cin >> a >> b;
    la = strlen(a), lb = strlen(b);
    if(la > lb)
    {
        cout << 0;
        return 0;
    }
    i = 1;
    while(i < la)
    {
        if(a[i] == a[len])
        {
            len++;
            lps[i] = len;
            i++;
        }
        else
        {
            if(len == 0)
            {
                lps[i] = 0;
                i++;
            }
            else
            {
                len = lps[len-1];
            }
        }
    }
    i = j = 0;
    while(i < lb)
    {
        if(b[i] == a[j])
        {
            i++, j++;
        }
        if(j == la)
        {
            nr++;
            if(nr <= 1000)rez[nr] = i-la;
            j = lps[j-1];
        }
        else if(i < lb  &&  b[i] != a[j])
        {
            if(j == 0)
            {
                i++;
            }
            else
            {
                j = lps[j-1];
            }
        }
    }
    cout << nr << '\n';
    for(int i = 1 ; i <= nr  &&  i <= 1000 ; i++)
    {
        cout << rez[i] << " ";
    }
    return 0;
}