#include <bits/stdc++.h>
using namespace std;
int v[101];
int main ()
{
    int n,a,b,i;
    cin>>n;
    for(i=1;i<=n;i++) cin>>v[i];
    if(n!=100)
    {
        if(v[1]!=1) cout<<1<<"-"<<v[i]-1<<endl;
        for(i=1;i<n;i++)
        {
            a=v[i]+1;
            b=v[i+1]-1;
            if(a<=b) cout<<a<<"-"<<b<<endl;
        }
        a=v[n]+1;
        if(a<=100) cout<<a<<"-"<<100<<endl;
    }
    else cout<<" All clear!";
}