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

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, b, a) for(int i = (b) - 1; i >= (a); i--)
#define SZ(a) (int)a.size()
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;


mt19937 rng;
int rand(int l, int r)
{
	return rng() % (r - l + 1) + l;
}

string read()
{
	string s;
	cin >> s;
	s.pop_back();
	
	int posDot = -1;
	FOR(i, 0, SZ(s))
		if(s[i] == '.')
			posDot = i;
	
	if(posDot == -1)
		return s;
	while(s.back() == '0')
		s.pop_back();
	if(s.back() == '.')
		s.pop_back();
	return s;
}

int main()
{
    ios::sync_with_stdio(0); 
    cin.tie(0);
	
	int n;
	cin >> n;
	map<string, string> res;
	set<string> names;
	
	
	FOR(i, 0, n)
	{
		string s = read();
		
		if(res.count(s) == 0)
		{
			string cur = "";
			while(cur == "" || names.count(cur))
			{
				cur = "";
				FOR(it, 0, 10)
				{
					cur += char('a' + rand(0, 25));
				}
			}
			res[s] = cur;
		}
			
		cout << res[s] << "\n";
	}

	


	return 0;
}