#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
char s[2000001];
int cate;
long long x=1,y=1,n1=100021,n2=100007,i,j,k,l,n,r1,r2,q,nr1,nr2,v[1001],nrr1=0,nrr2=0;
int main ()
{
freopen("strmatch.in","r",stdin);
freopen("strmatch.out","w",stdout);
gets(s);
n=strlen(s);
for(i=0;i<n;i++)
    {
    q=s[i];
    nr1=((nr1*123)%n1+q)%n1;
    nr2=((nr2*123)%n2+q)%n2;
    if(i!=0){
        x=(x*123)%n1;
        y=(y*123)%n2;
    }
}
gets(s);
int h=strlen(s);
//taiere();
if(h<n)
    printf("0\n");
else
    {
    nrr1=0,nrr2=0;
    for(i=0;i<n;i++)
        {
        q=s[i];
        nrr1=nrr1*123+q;
        nrr2=nrr2*123+q;
        nrr1%=n1;
        nrr2%=n2;
        }
    if(nrr1==nr1&&nrr2==nr2)
        {
        cate++;
        v[cate]=0;
        }
    for(i=1;i<=h-n;i++)
        {
        int x1,y1;
        x1=(x*s[i-1])%n1;
        y1=(y*s[i-1])%n2;
        nrr1-=x1;
        nrr2-=y1;
        if(nrr1<0)
            nrr1+=n1;
        if(nrr2<0)
            nrr2+=n2;
        q=s[i+n-1];
        nrr1=(nrr1*123+q)%n1;
        nrr2=(nrr2*123+q)%n2;
        if(nrr1==nr1&&nrr2==nr2)
            {
            cate++;
            if(cate<=1000)
                v[cate]=i;
            }
        }
    printf("%d\n",cate);
    int q1q=min(cate,1000);
    for(i=1;i<=q1q;i++)
        printf("%lld ",v[i]);
    }
return 0;
}