#include<bits/stdc++.h>

using namespace std;

bool check(int m){

for(int i=2;i*i<m;i++){

	if(m%i==0){

		return false;

	}

}

return true;

}

int main(){

char a[101];
int len,i,b[101]={0},maxx=INT_MIN,minn=INT_MAX;
cin.getline(a,100);
len=strlen(a);
for(i=0;i<len;i++){
	b[int(a[i])-96]++;
}
for(i=1;i<=26;i++){
	if(b[i]!=0){
		maxx=max(maxx,b[i]);
		minn=min(minn,b[i]);
	}
}
if(maxx-minn<2){
	cout<<"No Answer"<<endl<<"0";
	return 0;
}
if(check(maxx-minn)){
	cout<<"Lucky Word"<<endl<<maxx-minn;
	return 0;
}
else{
	cout<<"No Answer"<<endl<<"0";
	return 0;
}
return 0;

}