#include <iostream>
#include <cstdio>
#include <cstring>
#define nmax 2000010
using namespace std;

char a[nmax],b[nmax];
int pref[nmax],sol[1003],nrsol;

void prefix(char *s,int *p)
{
    int n=strlen(s+1);
    int k=0;
    p[1]=0;
    for(int i=2;i<=n;i++)
    {
        while( k>0 && s[k+1]!=s[i])
            k=p[k];
        if(s[i]==s[k+1]) k++;
        p[i]=k;
    }
}

void ver(char *s,char *s1,int *p)
{
    int n=strlen(s+1);
    int m=strlen(s1+1);
    int k=0;
    p[1]=0;
    for(int i=1;i<=m;i++)
    {
        while(k>0 && s[k+1]!=s1[i])
            k=p[k];
        if(s1[i]==s[k+1]) k++;
        if(k==n)
        {
            nrsol++;
            if(nrsol<=1000) sol[nrsol]=i-n;
        }
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    gets(a+1);
    gets(b+1);
    prefix(a,pref);
    ver(a,b,pref);
    printf("%d\n",nrsol);
    for(int i=1;i<=nrsol;i++)
    {
        if(i>1000) break;
        printf("%d ",sol[i]);
    } cout<<'\n';
    fclose(stdin);
    fclose(stdout);
    return 0;
}