#include <fstream>
#include <vector>
#include <cstring>
#define b 27
#define b1 29
#define MOD 10007
#define MOD1 66013
#define DIM 2000020
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
vector <int> sol;
vector <int> :: iterator it;
int val,val1,h,h1,x,x1,p,p1,i,nr;
char s[DIM],s1[DIM];
int main()
{
    f.getline(s,2000001);
    f.getline(s1,2000001);
    x=strlen(s);
    x1=strlen(s1);
    val=val1=0;
    h=h1=0;
    p=p1=1;
    if(x>x1)
    {
        g<<0<<'\n';
        f.close();
        return 0;
    }
    for( i=0 ; i< x ; i++ )
    {
        val = ( val*b + int (s[i]) ) %MOD;
        val1 = ( val1*b1 + int(s[i]) ) %MOD1;
        h = ( h*b + int (s1[i]) ) %MOD;
        h1 = ( h1*b1 + int(s1[i]) ) %MOD1;
        if ( i!=1 )
        {
            p = ( p * b ) % MOD;
            p1 = ( p1 * b1 ) % MOD1;
        }
    }
    if(h==val && h1==val1)
    {
        nr++;
        sol.push_back(0);
    }
    for( i=x ; i< x1; i++ )
    {
        h =(( h-( int (s1[i-x])*p ) % MOD + MOD) * b + int(s1[i])) % MOD;
        h1 =(( h1- (int (s1[i-x])*p1 ) % MOD1 + MOD1) * b1 + int(s1[i])) % MOD1;
        if(h==val && h1==val1)
        {
            nr++;
            sol.push_back(i-x+1);
        }
    }
    g<<nr<<'\n';
    for(auto it:sol)
        g<<it<<" ";
    return 0;
}