#include<stdio.h>

void numin(int index, int *numBox) {
	char str;
	for (int i = 0; i<index; i++)
		numBox[i] = 0;
	int cnt = 0;
	while (cnt < index) {
		str = getchar();
		if (str == '\n') {
			if (cnt != 0)
				break;
		}
		else if (str < '0' || str > '9')
			cnt++;
		else
			numBox[cnt] = numBox[cnt] * 10 + (int)str - (int)'0';
	}
}


int main() {
	int number=0;
	int total =0;
	int value[50];

	// 入力処理
	scanf("%d", &number);
	scanf("%d", &total);
	printf("%d", number);
	printf("%d", total);
	numin(number, value);
	for (int i = 0; i < number; i++)
		printf("%d", value[i]);

	unsigned long long switcher = 0;

	int plus = 0;
	
	if(number > 3){}
	for (int i = 2; i < number; i++)
		plus += value[i];
	
	if (plus + value[0] + value[1] != total) {
		switcher = 1;
		int ans = value[0];
		unsigned long long cursor = 1;
		int point = 2;
		// 計算処理
		while (1) {
			// 計算
			for (int i = 0; i < (int)cursor; i++) {
				if ((switcher >> i) & 1)
					ans *= value[i + 1];
				else
					ans += value[i + 1];
			}
			if (total == ans + plus)
				break;

			ans = value[0];

			if (++switcher == point) {
				plus -= value[++cursor];
				point *= 2;
			}
		}
	}

	// 結果表示
	for (int i = 0; i < number - 1; i++) {
		if ((switcher >> i) & 1)
			printf("*");
		else
			printf("+");
	}

	return 0;
}