#include <iostream>
using namespace std;

int main()
{
    int n,i,v[99],b,ok;
    cin>>n;
    ok=0;
    for(i=0;i<n;i++)
        cin>>v[i];

    for(i=0;i<n-1;i++)
        if(v[i+1]-v[i]>1){
            ok=1;
            cout<<v[i]+1<<"-"<<v[i+1]-1<<endl;
        }

    if(v[n-1]<100){
        ok=1;
        cout<<v[n-1]+1<<"-"<<100;
    }
    if(ok==0)
        cout<<"All clear!";
    return 0;
}