#include <iostream>

using namespace std;

int main()
{
    int n, a[100], x, y;
    bool ac = true;
    cin >> n;

    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }

    for (int i = 0; i < n-1; ++i) {
        if (a[i+1] - a[i] > 1) {
            cout << a[i]+1 << "-" << a[i+1]-1 << endl;
            ac = false;
        }
    }

    if (a[n-1] < 100) {
        cout << a[n-1]+1 << "-100" << endl;
    }

    if (ac) {
        cout << "All clear!";
    }
    return 0;
}