#include<bits/stdc++.h>
using namespace std;

int main()
{
    string a;	
    cin>>a;		//输入单词
    int word[26],maxn = 0,minn = 101;	//word用来存字母的出现次数，maxn用来存最大值，minn用来存最小值
    int prime[25]={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};		//因为单词的长度最大就100，所以我把100以内所有的质数列举了出来
    for(int i = 0;i<a.length();i++)	//开始判断字母个数，循环a.length()次
    {
        if(a[i] == 'a')		//如果a[i] = 'a',word[0]+1
        {
            word[0]+=1;
        }
        else if(a[i] == 'b')	//如果a[i] = 'b',word[1]+1
        {
            word[1]+=1;
        }
        else if(a[i] == 'c')	//如果a[i] = 'c',word[2]+1
        {
            word[2]+=1;
        }
        else if(a[i] == 'd')	//如果a[i] = 'd',word[3]+1
        {
            word[3]+=1;
        }
        else if(a[i] == 'e')	//如果a[i] = 'e',word[4]+1
        {
            word[4]+=1;
        }
        else if(a[i] == 'f')	//如果a[i] = 'f',word[5]+1
        {
            word[5]+=1;
        }
        else if(a[i] == 'g')	//如果a[i] = 'g',word[6]+1
        {
            word[6]+=1;
        }
        else if(a[i] == 'h')	//如果a[i] = 'h',word[7]+1
        {
            word[7]+=1;
        }
        else if(a[i] == 'i')	//如果a[i] = 'i',word[8]+1
        {
            word[8]+=1;
        }else if(a[i] == 'j')	//如果a[i] = 'j',word[9]+1
        {
            word[9]+=1;
        }
        else if(a[i] == 'k')	//如果a[i] = 'k',word[10]+1
        {
            word[10]+=1;
        }
        else if(a[i] == 'l')	//如果a[i] = 'l',word[11]+1
        {
            word[11]+=1;
        }
        else if(a[i] == 'm')	//如果a[i] = m'',word[12]+1
        {
            word[12]+=1;
        }
        else if(a[i] == 'n')	//如果a[i] = 'n',word[13]+1
        {
            word[13]+=1;
        }
        else if(a[i] == 'o')	//如果a[i] = 'o',word[14]+1
        {
            word[14]+=1;
        }
        else if(a[i] == 'p')	//如果a[i] = 'p',word[15]+1
        {
            word[15]+=1;
        }
        else if(a[i] == 'q')	//如果a[i] = q'',word[16]+1
        {
            word[16]+=1;
        }
        else if(a[i] == 'r')	//如果a[i] = 'r',word[17]+1
        {
            word[17]+=1;
        }
        else if(a[i] == 's')	//如果a[i] = 's',word[18]+1
        {
            word[18]+=1;
        }
        else if(a[i] == 't')	//如果a[i] = 't',word[19]+1
        {
            word[19]+=1;
        }
        else if(a[i] == 'u')	//如果a[i] = 'u',word[20]+1
        {
            word[20]+=1;
        }
        else if(a[i] == 'v')	//如果a[i] = 'v',word[21]+1
        {
            word[21]+=1;
        }
        else if(a[i] == 'w')	//如果a[i] = 'w',word[22]+1
        {
            word[22]+=1;
        }
        else if(a[i] == 'x')	//如果a[i] = 'x',word[23]+1
        {
            word[23]+=1;
        }
        else if(a[i] == 'y')	//如果a[i] = 'y',word[24]+1
        {
            word[24]+=1;
        }
        else if(a[i] == 'z')	//如果a[i] = 'z',word[25]+1
        {
            word[25]+=1;
        }
    }
    for(int i = 0;i<a.length();i++)
    {
        if(a[i]>maxn)	//判断最大值
        {
            maxn = a[i];
        }
    }
    for(int i = 0;i<a.length();i++)	
    {
        if(a[i]<minn)	//判断最小值
        {
            minn = a[i];
        }
    }
    int zhishu = maxn-minn,z = 0;	//zhishu用来存maxn-minn的值
    for(int i = 0;i<25;i++)
    {
        if(maxn-minn == *prime)	//判断是不是质数，如果是z+1
        {
            z++;
        }
    }
    if(z == 1)	//如果z = 1，为Lucky Word
    {
        cout<<"Lucky Word"<<endl;
        cout<<zhishu<<endl;
    }
    else	//否则不是
    {
        cout<<"No Answer"<<endl;
        cout<<"0"<<endl;
    }
    return 0;
}

样例过了5个

各位dalao帮我看看哪里错了，thanks