#include <iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int urm[100];
char t[2000001],p[2000001],n,m,nr,apar[1001];

void urmator(char p[])
{
    int m=strlen(p+1);
    urm[1]=0;
    int k=0;
    for(int q=2;q<=m;q++)
    {
        while(k>0&&p[k+1]!=p[q])
            k=urm[k];
        if(p[k+1]==p[q])k++;
        urm[q]=k;
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    cin>>p+1>>t+1;
    n=strlen(t+1);
    m=strlen(p+1);
    urmator(p);
    int q=0;
    for(int i=1;i<=n;i++)
    {
        while(q>0&&p[q+1]!=t[i])
            q=urm[q];
        if(p[q+1]==t[i])
            q++;
        if(q==m&&nr<999)
        {
            apar[nr++]=i-m;
            q=urm[q];
        }
    }
    printf("%d\n",nr);
    for(int i=0;i<nr;i++)
        printf("%d ",apar[i]);
    return 0;
}