#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <functional>
#include <numeric>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <utility>
#include <sstream>
#include <complex>

using namespace std;

#define FOR(i,a,b) for(long long i=(a);i<(b);i++)
#define REP(i,N) for(long long i=0;i<(N);i++)
#define ALL(s) (s).begin(),(s).end()
#define fi first
#define se second

#define PI acos(-1.0)
#define INF 1000000007

typedef long long ll;
typedef pair<ll, ll> P;
typedef pair<double, double> PD;
typedef pair<string, ll> PS;
typedef vector<ll> V;

double a;
int n;
string ans[6] = { "", "", "", "", "", "" };

int main(){
	cin >> n;
	REP(i, n){
		cin >> a;
		for (int j = 0; j < 6; j++){
			if (a < 165 + 5 * j){
				ans[j] += "*";
				break;
			}
		}
	}
	REP(j, 6)cout << j+1 << ':' << ans[j] << endl;
}