#include <fstream>
#include <cstring>
using namespace std;ifstream f("strmatch.in");ofstream g("strmatch.out");char s[2000010],t[2000010];int l,p[2000010],v[1000],ap,i,n,m;
int main(){f>>s+1>>t+1;n=strlen(s+1);m=strlen(t+1);
    for(i=2; i<=n; i++){while(l!=0&&s[i]!=s[l+1])l=p[l];if(s[i]==s[l+1])l++;p[i]=l;}
    l=0;
    for(i=1; i<=m; i++){while(l!=0&&t[i]!=s[l+1])l=p[l];if(t[i]==s[l+1])l++;if(n==l){ap++;if(ap<=1000)v[ap]=i-n;l=p[l];}}
    g<<ap<<'\n';
    if(ap>1000)ap=1000;
    for(i=1;i<=ap;i++)g<<v[i]<<" ";
    return 0;
}