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#include <bits/stdc++.h>
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using namespace std;
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int n;
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// sscanf和sprintf详解
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// https://blog.csdn.net/qq_40563761/article/details/107087811
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/*
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sscanf与sprintf
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sscanf(str,"%d",&n) 其实就是把str的内容以"%d"的格式写入到n中（从左到右）
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同理 sprintf(str,"%d",n)就是把n以"%d"的格式写入到str （从右到左）
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*/
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bool check(string s) {
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int a, b, c, d, port;
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//字符串格式化提取+判断转换成功个数
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if (sscanf(s.c_str(), "%d.%d.%d.%d:%d", &a, &b, &c, &d, &port) != 5) return false;
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//需符合IP地址规则
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if (a < 0 || a > 255 || b < 0 || b > 255 || c < 0 || c > 255 || d < 0 || d > 255 || port < 0 || port > 65535)
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return false;
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/*
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居然有这个恶心的用例:
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179.90.115.156:54168:
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解决的办法：把分离出的数字再组装回去，和原来一样就是OK，否则就不OK!
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*/
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// if ((string)ss != s) {
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// cout << "ss=" << (string)ss << endl;
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// cout << s << endl;
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// }
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char ss[25]; // 3*4+3+5=20
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sprintf(ss, "%d.%d.%d.%d:%d", a, b, c, d, port);
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return (string)ss == s;
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}
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map<string, int> _map;
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string op, ip;
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int main() {
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//文件输入
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freopen("P7911_13.in", "r", stdin);
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cin >> n;
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for (int i = 1; i <= n; i++) {
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cin >> op >> ip;
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if (!check(ip)) {
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cout << "ERR" << endl;
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continue;
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}
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if (op == "Server") {
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if (_map[ip])
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puts("FAIL");
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else
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_map[ip] = i, puts("OK");
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} else {
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if (_map[ip] == 0)
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puts("FAIL");
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else
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printf("%d\n", _map[ip]);
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}
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}
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return 0;
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}
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