#include<cstdio>
#include<cstring>
#include<vector>
using namespace std;
int a1,a2,b1,b2,bz=31,m1=100007,m2=666013,p1=1,p2=1,l1,l2,nr;
char a[2000000],b[2000000];
vector <int> poz;
int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    gets(a);
    gets(b);
    l1=strlen(a);
    l2=strlen(b);
    for(int i=1;i<l1;i++)
    {
        p1=(p1*bz)%m1;
        p2=(p2*bz)%m2;
    }
    for(int i=0;i<l1;i++)
    {
        a1=(a1*bz+a[i])%m1;
        a2=(a2*bz+a[i])%m2;
        b1=(b1*bz+b[i])%m1;
        b2=(b2*bz+b[i])%m2;
    }
    if(a1==b1||a2==b2) poz.push_back(0);
    for(int i=l1;i<l2;i++)
    {
        b1=((b1+m1-((p1)*b[i-l1])%m1)*bz+b[i])%m1;
        b2=((b2+m2-((p2)*b[i-l1])%m2)*bz+b[i])%m2;
        if(a1==b1||a2==b2) poz.push_back(i-l1+1);
        if(poz.size()==1000) break;
    }
    printf("%d\n",poz.size());
    for(int i=0;i<poz.size();i++)
        printf("%d ",poz[i]);
    printf("\n");
    fclose(stdin);
    fclose(stdout);
    return 0;

}