#include<fstream>
#include<cstring>
using namespace std;
int i, nrsol, L, k, sol[1007], n, m, p[2000007];
char a[2000007], b[2000007];
ifstream in("strmatch.in");
ofstream out("strmatch.out");
int main(){
    in>>a+1;
    in>>b+1;
    n=strlen(a+1);
    m=strlen(b+1);
    for(i=2; i<=n; i++){
        while(a[i]!=a[L+1] && L!=0)
            L=p[L];
        if(a[i]==a[L+1])
            L++;
        p[i]=L;
    }
    L=0;
    for(i=1; i<=m; i++){
        while(b[i]!=a[L+1] && L!=0)
            L=p[L];
        if(b[i]==a[L+1])
            L++;
        if(L==n){
            nrsol++;
            if(nrsol<=1000){
                sol[++k]=i-L;
            }
        }
    }
    out<<nrsol<<"\n";
    for(i=1; i<=k; i++)
        out<<sol[i]<<" ";
return 0;
}