#include<iostream #include<cstring using namespace std; int main() { string s; int sum[30]= {0},k,maxn,minn,x,lock;

cin>>s;

	for(int i=0; i<s.length(); i++) {
		sum[ s[i] - 'a' + 1 ]++;
	}

	lock=1;
	for(int i=1; i<=26; i++) {
		if(sum[i]!=0&&lock==1) {
			maxn=minn=sum[i];
			lock=0;
		}
		if(sum[i]>maxn)maxn=sum[i];
		if(sum[i]<minn&&sum[i]!=0)minn=sum[i];
	}

	x=maxn-minn;
	k=1;

	for(int i=2; i*i<=x; i++) {
		if(x%i==0)k=0;
	}
	if(x==0||x==1)k=0;

	if(k==1)cout<<"Lucky Word"<<endl;
	else cout<<"No Answer"<<endl;

	if(k==1)cout<<x;
	else cout<<0;

	return 0;
}