#include <cstdio>
#include <cstring>

using namespace std;

int pi[2000010],sol[1010],nr,n,n1,i,k;
char v[2000010],v1[2000010];

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    scanf("%s\n%s",v+1,v1+1);
    n=strlen(v+1);
    n1=strlen(v1+1);
    for(i=2;i<=n;i++)
    {
        while(k>0 && v[k+1]!=v[i]) k=pi[k];
        if(v[k+1]==v[i]) k++;
        pi[i]=k;
    }
    k=0;
    for(i=1;i<=n1;i++)
    {
        while(k>0 && v[k+1]!=v1[i]) k=pi[k];
        if(v[k+1]==v1[i]) k++;
        if(k==n)
        {
            if(nr<1000) sol[++nr]=i-n;
            else nr++;
            k=pi[k];
        }
    }
    printf("%d\n",nr);
    if(nr>1000) nr=1000;
    for(i=1;i<=nr;i++) printf("%d ",sol[i]);
    return 0;
}