#include <fstream>
#include <string.h>
#define nmax 2000000
#define INF 1000000
#define MOD1 1000000007
#define MOD2 100009
#define baz 73
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
char a[nmax],b[nmax];
int ans[1001];
long long act1,act2;
int main()
{
    int n,m,i,sear1=0,sear2=0,rez=0,p1=1,p2=1;
    f>>a;
    f>>b;
    m=strlen(a);
    n=strlen(b);
    sear1=a[0];
    sear2=a[0];
    for(i=1;i<m;i++)
    {
        sear1=(sear1*baz+a[i])%MOD1;
        sear2=(sear2*baz+a[i])%MOD2;
        p1=(p1*baz)%MOD1;
        p2=(p2*baz)%MOD2;
    }
    for(i=0;i<m;i++)
    {
        act1=(act1*baz+b[i])%MOD1;
        act2=(act2*baz+b[i])%MOD2;
    }

    if(act1==sear1 && act2==sear2)
    {
        rez++;
        ans[rez]=0;
    }
    for(i=m;i<n;i++)
    {
        act1=((act1-(b[i-m]*p1)%MOD1+MOD1)*baz+b[i])%MOD1;
        act2=((act2-(b[i-m]*p2)%MOD2+MOD2)*baz+b[i])%MOD2;
        if(act1==sear1 && act2==sear2)
        {
            rez++;
            ans[rez]=i-m+1;
        }
    }
    g<<rez<<'\n';
    for(i=1;i<=rez;i++)
        g<<ans[i]<<' ';
    return 0;
}