#include <bits/stdc++.h>
#define min(a,b) a < b ? a : b

using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char s[2000010];
char t[2000010];
int sol[1002];
int p[2000010];

int n, m, L, aparitii = 0, i;

int main()
{
    fin>>s+1;
    fin>>t+1;

    n = strlen(s+1);
    m = strlen(t+1);

    p[1] = 0;
    L = 0;
    for (i=2; i<=n; i++)
    {

        while (L!= 0 && s[i] != s[L+1])
            L = p[L];
        if (s[i] == s[L+1])
            L++;
        p[i] = L;

    }

    L = 0;
    for (i=1; i<=m; i++)
    {
        while (L!=0 && t[i] != s[L+1])
            L = p[L];
        if(t[i] == s[L+1])
            L++;

        if (L == n)
        {

            aparitii++;
            if (aparitii <= 1000)
                sol[aparitii] = i-n;
            L = p[L];
        }

    }
    fout<<aparitii<<"\n";
    aparitii = min(1000, aparitii);
    for (i=1; i<=aparitii; i++)
        fout<<sol[i]<<" ";
    return 0;
}