#include <iostream>

using namespace std;
int n,x,sf,ok,v[120];
int main()
{
    cin>>n;
    while(n--)
    {
        cin>>x;
        v[x]=1;
    }
    v[101]=1;
    sf=1;
    for(sf=1;sf<=100;++sf)
    {
        if(!v[sf])
        {
            cout<<sf<<"-";
            while(!v[sf+1]) ++sf;
            cout<<sf<<'\n';
            ok=1;
        }
    }
    if(!ok) cout<<"All clear!";
    return 0;
}