#include <iostream>
#include <cstdio>
#include <cstring>

using namespace std;
int zhishu[26];
char s[101];
int a[26];

void zs();

int main()
{
    freopen("word.in","r",stdin);
    freopen("word.out","w",stdout);
    zs();
    memset(a,0,sizeof(a));
    int maxn=1,minn=100;
    int t;
    cin.getline(s,100);
    int len=strlen(s);
    for(int i=0;i<len;i++)
    {
        a[s[i]-'a']+=1;
        if(a[s[i]-'a']>maxn) maxn=a[s[i]-'a'];
    }
    for(int i=0;i<26;i++)
    {
        if(a[i]<minn&&a[i]!=0) minn=a[i];
    }
    t=maxn-minn;
    for(int i=0;i<26;i++)
    {
        if(t==zhishu[i])
        {
            cout<<"Lucky Word"<<endl;
            cout<<t<<endl;
            return 0;
        }
    }
    cout<<"No Answer"<<endl;
    cout<<"0"<<endl;
    return 0;
}
void zs()
{
    zhishu[0]=2;
    zhishu[1]=3;
    zhishu[2]=5;
    zhishu[3]=7;
    zhishu[4]=11;
    zhishu[5]=13;
    zhishu[6]=17;
    zhishu[7]=19;
    zhishu[8]=23;
    zhishu[9]=29;
    zhishu[10]=31;
    zhishu[11]=37;
    zhishu[12]=41;
    zhishu[13]=43;
    zhishu[14]=47;
    zhishu[15]=53;
    zhishu[16]=59;
    zhishu[17]=61;
    zhishu[18]=67;
    zhishu[19]=71;
    zhishu[20]=73;
    zhishu[21]=79;
    zhishu[22]=83;
    zhishu[23]=89;
    zhishu[24]=91;
    zhishu[25]=97;
}