#include <cstdio>
#include <algorithm>
#include <vector>

#define f first
#define s second

using namespace std;

int v[128];

int main ()
{
   // freopen ("file.in", "r", stdin);

    int n;
    scanf ("%d", &n);

    v[0] = 0;
    for (int i = 1; i <= n; ++i)
        scanf ("%d", &v[i]);

    v[++n] = 101;

    bool OK = false;
    for (int i = 1; i <= n; ++i)
        if (v[i] - v[i - 1] > 1)
        {
            OK = true;
            printf ("%d-%d\n", v[i - 1] + 1, v[i] - 1);
        }

    if (!OK)
        printf ("All clear!\n");

    return 0;
}