#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

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

string A,B;
vector < int > v;
int nA, nB;
vector < int > sol;

void citire()
{
    in>>A>>B;
    nA=A.size();
    nB=B.size();
}

void calc_v()
{
    v.resize(nA,0);
    int i=2,cnd=0;
    v[0]=-1;
    v[1]=0;
    while(i<nA)
    {
        if(A[i-1]==A[cnd])
        {
            cnd++;
            v[i]=cnd;
            i++;
        }
        else if(cnd)
            cnd=v[cnd];
        else
            i++;
    }
}

void DEBUG_af_v()
{
    for(auto x : v)
        cout<<x<<' ';
}

void rezolvare()
{
    int i=0,m=0;
    while(i+m<nB)
    {
        if(A[i]==B[i+m])
        {
            if(i==nA-1)
            {
                sol.push_back(m);
                m=m+i-v[i];
                i=-1;
            }
            i++;
        }
        else
        {
            if(v[i]>-1)
            {
                m=m+i-v[i];
                i=v[i];
            }
            else
            {
                i=0;
                m++;
            }
        }

    }
}

void afisare()
{
    out<<sol.size()<<'\n';
    for(auto x : sol)
        out<<x<<' ';
}

int main()
{
    citire();
    calc_v();
    rezolvare();
    afisare();
    return 0;
}