#include <cstdio>
#include <string.h>
using namespace std;
char s1[2000005];
char s2[2000005];
int p[2000005];
char a[2000005];
int n, m;
int nr=0;
void constr_p()
{
    int i=0;
    int j=-1;
    p[0]=-1;
    while(i<m)
    {
        while(j>=0 && s1[i]!=s1[j])
            j=p[j];
        i++;
        j++;
        p[i]=j;
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s\n",s1);

    scanf("%s",s2);
    m=strlen(s1);
    n=strlen(s2);
    constr_p();

    int i=0;
    int j=0;
    while(i<n)
    {
        while(j>=0 && s2[i]!=s1[j])
        {
            j=p[j];
        }
        i++;
        j++;
        if(j==m)
        {
            j=p[j];
            nr++;
            if(nr<=1000)
                a[nr]=i-m;
        }
    }
    printf("%d\n",nr);
    if(nr>1000)
        nr=1000;
    for(int i=1; i<=nr; i++)
        printf("%d ",a[i]);
    return 0;
}