#include <iostream>

int main() {
    unsigned int count, actual, previous;
    bool OK = false;

    auto c_print = [&](const unsigned int left, const unsigned int right) -> void {
        std::cout << left << '-' << right << std::endl;
        OK = true;
    };

    std::cin >> count >> actual;
    if(actual - 1 > 0)
        c_print(1, actual - 1);
    previous = actual;
    for(size_t it = 2; it <= count; it++) {
        std::cin >> actual;

        if(actual - previous > 1)
            c_print(previous + 1, actual - 1);

        previous = actual;
    }

    if(100 - previous > 0)
        c_print(previous + 1, 100);

    if(OK == false)
        std::cout << "All clear!";
    return 0;
}