#include <iostream>
#include <fstream>
#include <algorithm>
#include <math.h>
#include <string>
#include <vector>
#include <stdio.h>
#include <queue>
#include <set>

#define LL long long
#define pb push_back
#define lm 100001
#define MOD 1000000007

using namespace std;
int t,x;
int main(){

    //freopen("data.txt","r",stdin);

    scanf("%d",&t);
    if(t==100)
    {
        cout<<"All clear!\n";
        return 0;
    }
    int y=0;
    for(int i=1; i<=t; i++)
    {
        scanf("%d",&x);
        if(x>y+1)
        {
            cout<<y+1<<'-'<<x-1<<'\n';
            y=x;
        }
        else
            y=x;
    }
    if(x<100)
        cout<<x+1<<'-'<<100<<'\n';
    return 0;
}