#include<cstdio>

double t;

int n,i;

int main()

{

 freopen("p1.in","r",stdin);

 freopen("p1.out","w",stdout);

 for(i=scanf("%d",&n);t<=n;t+=1.0/i++);

 printf("%d",i-1);

}

#include<cstdio>

#include<algorithm>

using namespace std;

char in[110];

int m1=-200,m2=200,i,a[27],t;

int main(){

 freopen("word.in","r",stdin);

 freopen("word.out","w",stdout);

 for(i=0*scanf("%s",in);in[i]!='\0';a[in[i++]-'a']++);

 for(i=0;i<26;m1=max(m1,a[i]),m2=a[i++]?min(m2,a[i-1]):m2);

 for(t=m1-m2,i=2;t%i&&i<=t;i++);

 printf("%s\n%d",i==t?"Lucky Word":"No Answer",i==t?t:0);

}