#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char sir[2000005],s[2000005];
int l[2000005],v[1010];
int main()
{
    int i,j,n,numar=0,poz,m;
    fin>>s>>sir;
    n=strlen(s)-1;
    i=1;
    j=0;
    while(i<=n)
    {
        if(s[i]==s[j])
            l[i]=j+1,i++,j++;
        else
        {
            while(j>0&&s[j]!=s[i])
                j=l[j-1];
            if(s[j]==s[i])
                l[i]=j+1,i++,j++;
            else
                if(s[i]!=s[j]&&j==0)
                    l[i]=0,i++;
        }
    }
    i=0;
    j=0;
    m=strlen(sir)-1;
    while(j<=m)
    {
        if(s[i]==sir[j])
        {
             poz=j-i;
             while(s[i]==sir[j]&&i<=n)
                i++,j++;
            if(i==n+1)
                if(numar==1000)
                    break;
                else
                    v[++numar]=poz;
            i=l[i-1];
        }
        else
            {
                while(s[i]!=sir[j]&&i>0)
                    i=l[i-1];
                if(i==0&&s[i]!=sir[j])
                    j++;
            }
    }
    fout<<numar<<'\n';
    for(i=1;i<=numar;i++)
        fout<<v[i]<<' ';
    return 0;
}