不滿足的標記，純水

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;

int main()
{
    char s[25];
    char d[]="aeiou";
    while(cin>>s&&strcmp(s,"end"))
    {
        int flag=0,f=0,k=0;
        int key[25];
        memset(key,0,sizeof(key));
        int len=strlen(s);
        for(int i=0; i<len; i++)
        {
            if(s[i]==s[i+1]&&s[i]!='e'&&s[i]!='o')
                flag=1;

            for(int j=0; j<5; j++)
            {
                if(s[i]==d[j])
                {
                    f=1;
                    key[i]=1;
                }
            }
        }
        for(int i=0; i<len-2; i++)
        {
            if(key[i]==key[i+1]&&key[i+1]==key[i+2])
                k=1;
        }
        if(!flag&&f&&!k)
            printf("<%s> is acceptable.\n",s);
        else printf("<%s> is not acceptable.\n",s);
    }
    return 0;
}