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


void urmator(char p[])
{
    int m=strlen(p);
    urm[0]=-1;
    int k=-1;
    for(int q=1;q<m;q++)
    {
        while(k>-1&&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);
    scanf("%s %s", p, t);
    n=strlen(t);
    m=strlen(p);
    urmator(p);
    int q=-1;
    for(int i=0;i<n;i++)
    {
        while(q>-1&&p[q+1]!=t[i])
            q=urm[q];
        if(p[q+1]==t[i])
            q++;
        if(q==m-1)
        {
            if(nr<1000)
                apar[nr]=i-m+1;
            nr++;
            q=urm[q];
        }
    }
    printf("%d\n",nr);
    for(int i=0;i<nr;i++)
        printf("%d ",apar[i]);
    return 0;
}