#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("date.in");
ofstream fout("date.out");
int nextt[2000001],n,m,nr,sol[1001];
char P[2000001],T[2000001];
void urm()
{
    int k=0;
    for(int i=2; i<=n; ++i)
    {
        while(k>0 && P[k+1]!=P[i])
            k=nextt[k];
        if(P[k+1]==P[i])
            ++k;
        nextt[i]=k;
    }
}
int main()
{
    int x=-1;
    fin>>P+1>>T+1;
    n=strlen(P+1);
    m=strlen(T+1);
    urm();
    for(int i=1; i<=m; ++i)
    {
        while(x>0 && P[x+1]!=T[i])
            x=nextt[x];
        if(P[x+1]==T[i])
            ++x;
        if(x==n)
        {
            ++nr;
            if(nr<1001)
                sol[nr]=i-n+1;
            x=nextt[x];
        }
    }


    fout<<nr<<'\n';
    for(int i=1; i<=min(nr,1000); i++)
        fout<<sol[i]<<' ';
    fout<<'\n';
    return 0;
}