#include <fstream>
#define nm 2000003
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

char s[nm],x[nm];
int t[nm],sol[1002];
int k,j,c;

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