tem.cpp

/*              |\ | |  ||\ \ /(_~     |~)|_~|\/||_~|\/||~)|_~|~)
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                (J U S T   L I K E   E V E R Y O N E   E L S E !)

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*/                              
#include<bits/stdc++.h>
using namespace std;
 
#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define LL long long 
#define mod 1000000007 
#define all(v) v.begin(),v.end()
#define pr(v) pair<v,v>
#define pb push_back
#define FOR(i, j, k) for (auto i=j ; i<k ; i++)
#define ROF(i, j, k) for (auto i=j ; i>=k ; i--) 
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false); debug("%s time : %.4fs", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))

const long long INF = 1e18;
const long long MAX = 2e5+10;

int isVowel(char ch) {
    if(ch=='?') return -1;
    if( (ch=='a' || ch == 'e' || ch == 'i' || ch=='o' || ch=='u'))
         return 1;
    return 0;
}

int main(){
    fastio;
    int t=1; //cin>>t;
    while(t--){
        string s; cin>>s;
        int n= s.size();
        int v=0,c=0,q=0,v_=0,c_=0;
        bool bad=false,Q=false,mixed=false;
        FOR(i,0,n) {
            if(isVowel(s[i])==1) v++,c=0,v_++,c_=0;
            if(isVowel(s[i])==0) c++,v=0,c_++,v_=0;
            if(s[i]=='?') q++,Q=true,c_++,v_++,c=0,v=0;
            if(c>=3 || v>=5) bad =true;
            if(c_>=3 || v_>=5) mixed =true;
        }
        string a="aaaa?zz",b="zz?aaaa";
        FOR(i,0,n-6) {
            int x=0,y=0;
            FOR(j,0,7) if(isVowel(s[i+j]) == isVowel(a[j])) x++;
            FOR(j,0,7) if(isVowel(s[i+j]) == isVowel(b[j])) y++;
            if(x==7 || y==7) q--;
        }
       // cout<<q<<" ";
        if(bad || (Q && q==0)) cout<<"BAD";
        else if(mixed) cout<<"MIXED";
        else cout<<"GOOD";
    }
}