#include <bits/stdc++.h>

#define mod1 100007
#define mod2 100021
#define bz 127

using namespace std;

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

bool ok[100005];
char a[100005],b[100005];
int na,nb,h1,h2,v1,v2,bz1,bz2,nr;

int main()
{
    f >> a >> b;
    na=strlen(a);
    nb=strlen(b);
    bz1=1;
    bz2=1;
    for (int i=0; i<na; i++ )
    {
        h1=(h1*bz+a[i])%mod1;
        h2=(h2*bz+a[i])%mod2;

        if ( i>0 )
        {
            bz1=(bz1*bz)%mod1;
            bz2=(bz2*bz)%mod2;
        }

        v1=(v1*bz+b[i])%mod1;
        v2=(v2*bz+b[i])%mod2;
    }
    if ( v1==h1 && v2==h2 )
    {
        ok[0]=true;
        nr++;
    }
    for (int i=na; i<nb; i++ )
    {
        v1=((v1-(b[i-na]*bz1)%mod1+mod1)*bz+b[i])%mod1;
        v2=((v2-(b[i-na]*bz2)%mod2+mod2)*bz+b[i])%mod2;
        if ( v1==h1 && v2==h2 )
        {
            ok[i-na+1]=true;
            nr++;
        }
    }
    g << nr;
    g << '\n';
    for (int i=0; i<nb; i++ )
        if ( ok[i] )
           g << i << " ";
    return 0;
}