#include <cstdio>
#include <cstring>
#define size  2000001
using namespace std;
char p[size], str[size];
int i, j, pi[size], m, n, v[1001], k;
int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    scanf("%s", p); scanf("%s", str);
    m=strlen(p); n=strlen(str);
    j=-1;
    for(i=1;i<=m-1;i++)
    {
        while(j>0&&p[i]!=p[j+1])
            j=pi[j];
        if(p[i]==p[j+1])
            j++;
        pi[i]=j;
    }
    j=-1;
    for(i=0;i<=n-1;i++)
    {
        while(j>0&&p[j+1]!=str[i])
            j=pi[j];
        if(str[i]==p[j+1])
            j++;
        if(j==m-1)
        {
            v[k++]=i-m+1;
            if(k>1000)
            {
                i=n;
                break;
            }
            j=pi[j];
        }
    }
    printf("%d\n", k-1);
    for(i=0;i<=k-1;i++)
        printf("%d ", v[i]);
    printf("\n");
    return 0;
}