2，4，9wa

#include<stdio.h>
#include<string.h>
 int judge(int m)
    {
        int p;
        if(m<2)
        return 0;
        for(p=2;p<m;p++)
        if(m%p==0)
        return 0;
        return 1;
    }
int main()
{
    int n,le[30]={0},i,j,min=30,max=0;
   char str[105];
   scanf("%s",str);
   n=strlen(str);
   for(i=1;i<=n;i++)
   {
       le[str[i]-'a']++;
       if(le[str[i]-'a']<min)
       min=le[str[i]-'a'];
       if(le[str[i]-'a']>max)
       max=le[str[i]-'a'];
   }
   if(judge(max-min))
   {
       printf("Lucky Word\n%d",max-min);
   }
   else
   {
       printf("No Answer\n0");
   }
   return 0;
}