#include<iostream>
using namespace std;
int main(){
    int mon, dep_rec;
	float down_pay, amount_of_loan, amount_of_car;
	int total_months[50];
	int flag = 0;
	struct depreciation{
		int month;
		float dep;
	};
	do{
		total_months[flag] = 0;
		cin >> mon >> down_pay >> amount_of_loan >> dep_rec;
		if(mon < 0 ) break;
		depreciation *records = new depreciation[dep_rec];
		for(int i = 0; i < dep_rec; i++)
			cin >> records[i].month >> records[i].dep;
		float month_pay = amount_of_loan / mon;
		int n = 0;
		amount_of_car = down_pay + amount_of_loan;
		for(int j = 0; j < mon; j++){
			if(total_months[flag] !=0)
				amount_of_loan -= month_pay;
			if(records[n].month == j && n < dep_rec){
				amount_of_car = amount_of_car * (1 - records[n].dep);
				n++;
			}
			else
				amount_of_car = amount_of_car * (1 - records[n - 1].dep);
			total_months[flag] += 1;
			if(amount_of_loan < amount_of_car)   break;
		}
		flag++;
	}while(mon > 0);
	for(int k = 0; k < 50 && total_months[k] > 0; k++){
		if(total_months[k] == 2)
			cout<< "1 month"<<endl;
		else
			cout<< total_months[k] - 1 <<" months"<<endl;
	}
	return 0;
 }