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

char a[2000005], b[2000005];
int n, m;
int prefix[2000005];
int v[1005];

void citire()
{
    scanf("%s\n%s", a+1, b+1);
    n = strlen(a+1);
    m = strlen(b+1);
}

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

void potrivire()
{
    int k = 0;
    for(int i = 1; i<=m; i++)
    {
        while(k>0 && a[k+1] != b[i])
        {
            k = prefix[k];
        }
        if(a[k+1] == b[i])
        {
            k++;
        }
        if(k == n)
        {
            if(v[0]<=1000)
                v[v[0]++] = i-n;
            else
                v[0]++;
        }
    }
}

void afisare()
{
    printf("%d\n", v[0]-1);
    for(int i = 1; i<v[0] && i<=1000; i++)
    {
        printf("%d ", v[i]);
    }
}

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    citire();
    v[0] = 1;
    calculPrefix();
    potrivire();
    afisare();
    return 0;
}