#include<iostream>
#include<sstream>
//i'm flattered by the fact that i'll receive full feedback on this. warms my heart, i tell you 
// : " )  <--  me blushing

int main(){
	std::stringstream result;
	bool thingsHappened = false;
	int totalNumbers=0, aNumber=0, anotherOne=0;
	std::cin >> totalNumbers;
	for(int counter = 0; counter < totalNumbers; counter++){
		std::cin >> aNumber;
		if(aNumber - anotherOne > 1){
			thingsHappened = true;
			result<< anotherOne+1 << "-" << aNumber-1<< "\n";
		}
		anotherOne = aNumber;
	}
	if(anotherOne <= 99){
		thingsHappened = true;
		result << anotherOne + 1 << "-100"; //the rare doublehack in full effect
	}
	if(!thingsHappened){
		std::cout<<"All clear!";
		return 0;
	}
	std::cout << result.str();
}