#include <iostream>
#include <cstdio>
#include <string.h>
using namespace std;

char a[2000003];
char b[2000003];
int prefix[2000003];
int n, m;
int v[2000002], l;

void pref()
{
    int k = 0;
    for(int i = 2; i<=n; i++)
    {
        while(a[i] != a[k+1] && k!=0)
        {
            k = prefix[k];
        }
        if(a[i] == a[k+1])
        {
            k++;
        }
        prefix[i] = k;
    }
}

void rez()
{
    fgets(a+1, 2000002, stdin);
    fgets(b+1, 2000002, stdin);
    n = strlen(a+1)-1;
    m = strlen(b+1)-1;
    pref();
    /*for(int i = 1; i<=n; i++)
    {
        printf("%d ", prefix[i]);
    }*/
    int k = 0;
    for(int i = 1; i<=m; i++)
    {
        while(b[i] != a[k+1] && k!=0)
        {
            k = prefix[k];
        }
        if(b[i] == a[k+1])
            k++;
        if(k >= n)
        {
            if(l<1000)
                v[l++] = i-n;
            else
                l++;
        }
    }
    printf("%d\n", l);
    for(int i = 0; i<l && i<1000; i++)
        printf("%d ", v[i]);
}

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    rez();
    return 0;
}