#include <fstream>
#include <cstring>
#include <vector>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
int pi[2000001];
int n,m;
vector <int>sol;
void prefix(char a[])
{
    int k=0;
    pi[1]=0;
    for(int i=2; i<=m; i++)
    {
        while(k>0 && a[k+1]!=a[i])
            k=pi[k];
        if(a[k+1]==a[i])
            k++;
        pi[i]=k;
    }
}
int ct;
void solve(char a[],char b[])
{
    prefix(a);
    int k=0;
    for(int i=1; i<=n; i++)
    {
        while(k>0 && a[k+1]!=b[i])
            k=pi[k];
        if(a[k+1]==b[i])
            k++;
        if(k==m)
        {
            k=pi[m];
            ct++;
            if(ct<=1000)
            sol.push_back(i-m);

        }
    }
    g<<ct<<"\n";
    ct=min(ct,1000);
    for(int i=0; i<ct; i++)
        g<<sol.at(i)<<" ";
}
int main()
{
    char a[2000005],b[2000005];
    f>>a;
    f.get();
    f>>b;
    f.close();
    int i;
    for (i = 0; a[i] >= '0' && a[i] <= 'z'; ++i);
    m = i;
    for (i = 0; b[i] >= '0' && b[i] <='z'; ++i);
    n = i;

    for (i = m; i >= 1; --i)
        a[i] = a[i-1];
    a[0] = ' ';
    for (i = n; i >= 1; --i)
        b[i] = b[i-1];
    b[0] = ' ';
    solve(a,b);
}