#include <cstdio>
#include <cstring>
#include <queue>

#define LIM 1000
#define LMAX 2000005

using namespace std;

int nr_sol,phi[LMAX];
char S1[LMAX],S2[LMAX];

queue <int>sol;

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s %s",S1,S2);
    int k=0;
    int l1=strlen(S1)-1;
    int l2=strlen(S2)-1;

    for (int i=2;i<=l1;i++)
    {
        while (k && S1[k+1]!=S1[i])k=phi[k];
        if (S1[k+1]==S1[i])k++;
        phi[i]=k;
    }
    k=0;
    for (int i=1;i<=l2;i++)
    {
        while (k && S1[k+1]!=S2[i])k=phi[k];
        if (S1[k+1]==S2[i])k++;
        if (k==l1)nr_sol++;
        if (k==l1 && sol.size()<LIM)sol.push(i-l1);
    }
    printf("%d\n",nr_sol);
    for (;!sol.empty();sol.pop())
     printf("%d ",sol.front());

    fclose(stdin);
    fclose(stdout);
}