#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define int long long
#define pb push_back
void dbg_out() { cerr << endl; }
template<typename H, typename... T>
void dbg_out(H h, T... t) { cerr << ' ' << h; dbg_out(t...); }
#define dbg(...) {cerr << #__VA_ARGS__ << ':'; dbg_out(__VA_ARGS__); }

void solve(){
	int n; cin >> n;
	map<int, string> name;
	for(int i =0 ; i < n; i++){
		string a; cin >> a;
		int at = 0, cntd = 10;
		bool deci = 0;
		for(int j = 0; (unsigned int)j < a.size() - 1; j++){
			if(a[j] == '.'){
				deci = 1;
				continue;
			}
			if(deci) cntd--;
			at *= 10;
			at += (a[j] - '0'); 	
		}	
		for(int j = 0; j < cntd; j++){
			at *= 10;
		}
		if(!name.count(at)){
			string re(16, 'a');
			int p = 15;
			while(at){
				p--;
				re[p] = (at % 10) + 'a';
				at /= 10;
			}
			name[at] = re;
			cout << re << "\n";
		}else{
			cout << name[at] << "\n";
		} 
	}
}

signed main(){
	ios::sync_with_stdio(false); cin.tie(0);
	solve();
}