#include<bits/stdc++.h>
using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

char txt[2000002],pre[2000002];
int l[2000002];
vector<int>ras;

void prefix()
{
    int i=0;
    int k=0;
    for(int i=2;pre[i];++i)
    {
        while(k>0 && pre[k+1]!=pre[i])
            k=l[k];
        if(pre[k+1]==pre[i])
            k++;
        l[i]=k;
    }
}

void potrivire()
{
    int k=0;
    for(int i=1;txt[i];++i)
    {
        while(k>0 && txt[i]!=pre[k+1])
            k=l[k];
        if(txt[i]==pre[k+1])
            k++;
        if(k==strlen(pre+1))
            ras.push_back(i-k);
    }
    g<<ras.size()<<'\n';
    for(auto it:ras)
        g<<it<<' ';
}

int main()
{
    f.get(pre+1,2000002);
    f.get();
    f.get(txt+1,2000002);
    prefix();
    potrivire();
}