#include<cstdlib>

#include<cstdio>

#include<algorithm>

#include<cstring>

#include<string>

#include<cmath>

using namespace std;

int dic[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};

bool checkx(int x)

{

for(int i=0;i<=24;i++)

if(dic[i]==x) return 1;

else return 0;

}

int main()

{

char s[101];

cin>>s;

int maxn=0,minn=99;

int t[26]={0};

for(int i=0;i<=strlen(s)-1;i++)

t[(int)(s[i])-97]++;

for(int i=0;i<=25;i++)

if(t[i]>=maxn)

maxn=t[i];

for(int i=0;i<=25;i++)

if(t[i]<=minn&&t[i]!=0)

minn=t[i];

if(checkx(maxn-minn))

cout<<"Lucky Word"<<endl<<maxn-minn;

else

cout<<"No Answer"<<endl<<"0";

return 0;

}