65re仇眺

#include<bits/stdc++.h>
#define int long long
#define endl '\n'
using namespace std;
template<typename T> void read(T&x){
	int sign=1;x=0;char c;
	do{
		c=getchar();
		if(c=='-') sign=-1;
	}while(!isdigit(c));
	do{
		x=x*10+c-'0';
		c=getchar();
	}while(isdigit(c));
	x*=sign;
}
int n;
string op,s;
map<string,int> t;
signed main(){
//	freopen("1.in","r",stdin);
//	freopen("1.out","w",stdout);
	read(n);
	for(int k=1;k<=n;k++){
		cin>>op>>s;
		bool f=0,ff=0;
			int dian=0,mao=0;
			int x=0;
			for(int i=0;i<s.size();i++){
				if(s[i]=='.'){
					dian++;
				}
				if(s[i]==':'){
					mao++;
				}
				if(isdigit(s[i])){
					x=x*10+s[i]-'0';
					if(x==0){
						ff=1;
					}
					else if(ff==1){
//						cout<<i<<endl;;
						f=1;
						break;
					}
				}
				if(!isdigit(s[i])){
					if(x<0||x>255){
						f=1;
						break;
					}
					x=0;
					ff=0;
				}
			}
			if(x<0||x>65535){
				f=1;
			}
			if(dian!=3||mao!=1){
				f=1;
			}
//			cout<<dian<<" "<<mao<<endl;
			if(f==1){
				cout<<"ERR"<<endl;
				continue;
			}
		if(op=="Server"){
			if(t[s]==0){
				t[s]=k;
				cout<<"OK"<<endl; 
			}
			else if(t[s]!=0){
				cout<<"FAIL"<<endl;
			}
		}
		if(op=="Client"){
			if(t[s]!=0){
				cout<<t[s]<<endl;
			}
			if(t[s]==0){
				cout<<"FAIL"<<endl;
			}
		}
	}
	return 0;
}