#include <stdio.h>
#include <fstream>
#include <cstring>
using namespace std;
char s1[2000000],s2[2000000];
int n,m,i,j,k;
int pi[2000001],sol[1001];
int main()
{
    freopen("strmatch.in","r",stdin);
    fstream out("strmatch.out");
    scanf("%s",&s1);
    scanf("%s",&s2);
    n = strlen(s1);
    m = strlen(s2);
    for(i=1; i<n; i++)
    {
        while(k>0 && s1[i]!=s1[k])
            k=pi[k-1];
        if(s1[i]==s1[k])
            k++;
        pi[i]=k;
    }
    k=0;
    for(i=0; i<m; i++)
    {
        while(k>0 && s2[i]!=s1[k])
            k=pi[k-1];
        if(s2[i]==s1[k])
            k++;
        if(k==n){
            k = pi[n-1];
            sol[++j] = i-n+1;
        }
    }
    out<<j<<"\n";
    j=(j<1000)?j:1000;
    for(i=1;i<=j;i++)
    out<<sol[i]<<" ";
    return 0;
}