#include <fstream>
#include <cstring>
#define nmax 2000002
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

char s[nmax];char z[nmax];
int t[nmax];int sol[1005],c=0;

int main()
{
    fin>>z+1;
    fin>>s+1;
    int m;
    int k=0;
    int i=2;
    for(i=2;z[i]!=NULL;i++)
    {
        while(z[k+1]!=z[i]&&k)
            k=t[k];
        if(z[k+1]==z[i])
            k++;
        t[i]=k;
    }
    m=i-1;
    k=0;
    for(int i=2;s[i]!=NULL;i++)
    {
        while(z[k+1]!=s[i]&&k)
            k=t[k];
        if(z[k+1]==s[i])
            k++;
        if(k==m)
        {
            k=t[k];
            c++;
            if(c<=1000)
            {
                sol[c]=i-m;
            }
        }
    }
    fout<<c<<"\n";
    for(int i=1;i<=min(1000,c);i++)
        fout<<sol[i]<<" ";
    return 0;
}