#include <cstdio>
#include <iostream>
#include <string>

using namespace std;

int main() {
    freopen("candies.in", "r", stdin);
    freopen("candies.out", "w", stdout);

    string s1, s2;
    cin >> s1 >> s2;

    int l1 = s1.size(), l2 = s2.size();

    if (l1 < l2 || s1 == s2) {
        cout << "Bad luck\n";
        return 0;
    }

    if (l1 > l2 || s1 > s2) {
        cout << 0 << endl;
        return 0;
    }

    for (int i = 0; i < l1; i++) {
        if (s1[i] < s2[i]) {
            cout << 1 << endl << i + 1 << endl;
            return 0;
        }
    }

    return 0;
}