参考答案：

#include<iostream>
#include <cctype>
#include<string>
#include<algorithm>
using namespace std;
int i, a[200], b[200], j = 0, t;
string s;
int main()
{
    cin >> s;
    for (i = 0; i < s.length(); ++i)  ++a[s[i]];
    for (i = 0; i < 200; ++i)
    {
        if (a[i] != 0)
        {
            b[j] = a[i];
            ++j;
        }
    }
    sort(b, b + j);
    t = b[j - 1] - b[0];
    for (i = 2; i <= t; ++i) if (t % i == 0) break;
    if (i == t)
    {
        cout << "Lucky Word" << endl;
        cout << t;
    }
    else
    {
        cout << "No Answer" << endl;
        cout << '0';
    }
    return 0;
}