#include <stdio.h>
#define size 10001

double sum[size];
int m, n, k;

int main()
{
	int i, s, bf, af;
	int bd, sd;
	double v, ansm, ansn;
	scanf("%d %d %d", &m, &n, &k);
	for (i = 1, sum[0] = 0; i <= k; i++)
	{
		scanf("%lf", &v);
		sum[i] = sum[i - 1] + v;
	}
	s = (m > n) ? m : n;
	ansm = (sum[s] - sum[s - m]) / m;
	ansn = (sum[s] - sum[s - n]) / n;
	af = ansm > ansn ? 1 : -1;
	bd = sd = 0;
	if (af == 1)
	{
		printf("BUY ON DAY %d\n", s);
	}
	else
	{
		printf("SELL ON DAY %d\n", s);
	}
	for (i = s + 1; i <= k; i++)
	{
		bf = af;
		ansm = (sum[i] - sum[i - m]) / m;
		ansn = (sum[i] - sum[i - n]) / n;
		af = ansm > ansn ? 1 : -1;
		if (af == 1 && bf == -1)
		{
			bd = i;
			printf("BUY ON DAY %d\n", i);
		}
		else if (af == -1 && bf == 1)
		{
			sd = i;
			printf("SELL ON DAY %d\n", i);
		}
	}
	return 0;
}