#include <bits/stdc++.h> using namespace std; int a[26]; int main() { int le = 0, xunhuan = 0, maxn = -500, minn = 9999; string s; cin >> s; le = s.size(); for (int i = 0; i <= le - 1; i++) { xunhuan = s[i]; a[xunhuan - 97]++; } int zhishu[25] = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97}; for (int i = 0; i <= 25; i++) { if (a[i] < minn && a[i] != 0) minn = a[i]; } for (int i = 0; i <= 25; i++) { if (a[i] > maxn) maxn = a[i]; } int cha = maxn - minn; for (int i = 0; i <= 24; i++) { if (cha == zhishu[i]) { cout << "Lucky Word" << endl; cout << cha; return 0; } } cout << "No Answer" << endl; cout << "0"; return 0; }