///strmatch pe infoarena
#define  LMAX 2000005
#include <cstdio>
#include <cstring>
using namespace std;


char s[LMAX]; /// stringul in care cautam
char p[LMAX]; /// stringul cautat
int P[LMAX]; /// Sirul cu prefixe
int fin[1005];
int n, m, o;

void formare_Prefixe()
{
    int i=0, j=-1;
    P[0] = -1;
    while(i < m)
    {
        while(j >= 0 && p[i] != p[j])
            j = P[j];
        i++;
        j++;
        P[i] = j;
    }
}

void kmp()
{
    int i=0, j=0;
    while(i < n)
    {
        while(j >= 0 && s[i] != p[j])
            j = P[j];
        i++;
        j++;
        if(j == m)
        {
            j = P[j];
            o++
            if(o <= 1000)
                fin[o] = i-m;
        }
    }
}

void afis()
{
    printf("%d\n", o);
    if(o > 1000)
        o = 1000;
    for(int i=1; i<=o; i++)
        printf("%d ", fin[i]);
}


int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    scanf("%s\n%s", p, s);
    m = strlen(p);
    n = strlen(s);
    formare_Prefixe();
    kmp();
    afis();
    return 0;
}