#include<stdio.h>
#include<string.h>
int main()
{
    int i,maxn,minn,j,prime[50]={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};
    int sum[1000]={0};
    char a[100];
   scanf("%s",a);
    int len=strlen(a);
    for(i=0;i<len;i++){
        sum[a[i]-'a']++;
    }
    for(j=0;j<26;j++){
       if(sum[i]!=0){
        if(sum[i]>maxn)
        maxn=sum[i];
        if(sum[i]<minn)
        minn=sum[i];

    }}
    for(int i=0;i<26;i++){
        if(maxn-minn==prime[i]){
            printf("Lucky Word\n%d",maxn-minn);
            return 0;
}
}
    printf("No Answer\n0");
    return 0;
}