#include<cstring>
#include<cstdio>
#include<iostream>
#define lmax 2000002
using namespace std;
char patt[lmax],s[lmax];
int poz[1010];

int is_prime(int x)
{
    if(x<2||x>2&&x%2==0)return 0;
    for(int d=3;d*d<=x;d+=2)
        if(x%d==0)return 0;
    return 1;
}

int next_prime(int x)
{
    x++;
    while(!is_prime(x))x++;
    return x;
}

int main()
{
    FILE *f=fopen("strmatch.in","r");
    fgets(patt,lmax,f);
    fgets(s,lmax,f);
    f=fopen("strmatch.out","w");
    int lp=strlen(patt),i;
    if(patt[lp-1]=='\n')patt[--lp]=0;
    int ls=strlen(s);
    if(s[ls-1]=='\n')s[--ls]=0;
    if(ls<lp){fprintf(f,"0");return 0;}
    ///calculam doua numere prime strict mai mari ca ls
    //ls=2000002;
    //int hn1=next_prime(ls),hn2=next_prime(hn1);
    int hn1=2000003,hn2=2000029;
    ///calculam functziile hash ale pattern-ului
    ///shi incepem shi hash-ul stringului
    int h1=0,h2=0,hs1=0,hs2=0,nmatches=0,pow1=1,pow2=1,np=0;
    for(i=0;i<lp;i++)
    {
        h1=((long long)h1*256%hn1+patt[i])%hn1;
        h2=((long long)h2*256%hn2+patt[i])%hn2;
        hs1=((long long)hs1*256%hn1+s[i])%hn1;
        hs2=((long long)hs2*256%hn2+s[i])%hn2;
        if(i)
        {pow1=((long long)pow1%hn1*256)%hn1;
         pow2=((long long)pow2%hn2*256)%hn2;}
    }
    for(i=0;i<=ls-lp;i++)
    {
        if(hs1==h1&&hs2==h2)
        {
            np++;if(np<=1000)poz[np]=i;
        }
        hs1=((long long)(hs1-pow1*s[i])*256%hn1+s[i+lp])%hn1;
        hs1=(hs1+hn1)%hn1;
        hs2=((long long)(hs2-pow2*s[i])*256%hn2+s[i+lp])%hn2;
        hs2=(hs2+hn2)%hn2;
    }
    fprintf(f,"%d\n",np);
    np=min(np,1000);
    for(i=1;i<=np;i++)
        fprintf(f,"%d ",poz[i]);
    return 0;
}