#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;
#define MaxL 2000000

int p[MaxL];
char s[MaxL*2];
int main()
{
    ifstream in("strmatch.in");
    ofstream out("strmatch.out");
    int i, n, res, k=0, cnt=0, cnt2=0;
    char ch;
    in>>s;
    cnt=strlen(s);
    s[cnt]='*';
    in>>(s+(cnt+1));
    for(i=1; i<strlen(s); i++)
    {
        while(k!=0 && s[k]!=s[i])
        {
            k=p[k-1];

        }
        if(s[k]==s[i]){k++;}
        p[i]=k;


    }
    out<<k<<'\n';
    for(i=1; i<strlen(s); i++)
    {
        if(p[i]==cnt)
        {
            cnt2++;
            if(cnt2<=1000)
            out<<i-2*cnt<<" ";

        }
    }
    return 0;
}