#include <iostream>

using namespace std;

int fv[100], n, x, y, i, ver, j;

int main ()

{
    cin>>n;

    if (n==100)
    {
        cout<<"All clear!";
    }
    else
    {
        cin>>x;
        if(x!=1)
        {
            cout<<"1-"<<x-1<<'\n';
        }

        for (i=2; i<=n; i++)
        {
            cin>>y;
            if (y!=x+1)
            {
                cout<<x+1<<"-"<<y-1<<'\n';
            }
            x=y;
        }

        if (y!=100)
        {
            cout<<y+1<<"-"<<100;
        }

    }

    return 0;
}