#include <iostream>
#include <fstream>
#include <string.h>

using namespace std;

ifstream in("strmatch.in");
ofstream out("strmatch.out");

char s1[2000003];
char s2[2000003];
int val[2000003];
char *p1 = s1;
char *p2 = s2;
int cnt;
int len;

int main() {

    in.getline(s1, 2000003);
    in.getline(s2, 2000003);

    len = strlen(s1);
    bool f = (len%2==1);

    while(*p2 != '\n' && *p2 != '\0') {
        if(*p2 == *p1) {
            bool eq = true;
            while(p1-s1 < len-f*2) {
                //cout << "CMP1 " << *p1 << " " << *(p1+1) << endl;
                if(*p1 != *p2 || *(p1+1) != *(p2+1)) {
                    eq = false;
                    break;
                }
                p1 += 2;
                p2 += 2;
            }
            if(f) {
                if(*p1 != *p2) {
                    eq = false;
             //       cout << "CMP2 " << *p1 << endl;
                }
            }
            //cout << endl;
            p2 -= p1-s1;
            if(eq)
                val[cnt++] = p2 - s2;
            p1 = s1;
        }
        p2++;
    }

    out << cnt << '\n';
    for(int i = 0; i < cnt; i++) {
        if(i == 1000)
            break;
        out << val[i] << " ";
    }

    return 0;
}