#include <bits/stdc++.h>
using namespace std;
int lu,j,i,v[2000010],k,n,l;
char s1[2000010],s2[2000010];
int main()
{
    ifstream cin ("strmatch.in");
    ofstream cout ("strmatch.out");
    cin>>s1>>s2;
    lu=strlen(s1);
    j=0;
    for(i=1; i<lu; ++i)
    {
        while(s1[i]!=s1[j]&&j>0)j=v[j-1];
        if(s1[i]==s1[j])++j;
        v[i]=j;
    }
    n=lu;
    lu=strlen(s2);
    j=0;
    for(i=0; i<lu; ++i)
    {
        while(s2[i]!=s1[j]&&j>0)j=v[j-1];
        if(s2[i]==s1[j])l=j+1,++j;
        else l=0;
        if(l==n)
        {
            if(k==1000)break;
            v[++k]=i-n+1;
            l=0;
        }
    }
    cout<<k<<'\n';
    for(i=1; i<=k; ++i)cout<<v[i]<<" ";
    return 0;
}