#include <iostream>

using namespace std;

int a,b,n,k,i;

int main()
{
    cin>>n;
    a = 0;
    for( i = 1 ; i <= n ; i++ )
    {
        cin>>b;
        if( b - a > 1 )
        {
            k = 1;
            cout<<a+1<<'-'<< b-1<<'\n';
        }
        a = b;
    }
    if( b != 100 )cout<<b+1<<"-100",k=1;
    if( !k )
        cout<<"All clear!";
}