#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);
	numin(number, value);

	int ans = value[0];
	int cnt = 0;
	unsigned long long switcher = 0;

	// 計算処理
	while (switcher < 562949953421312) {
		// 計算
		if ((switcher >> cnt) & 1)
			ans *= value[++cnt];
		else
			ans += value[++cnt];

		if (cnt >= number - 1) {
			if (ans == total)
				break;
			ans = value[0];
			cnt = 0;
			switcher++;
		}
	}
	
	for (int i = 0; i < number - 1; i++) {
		if((switcher >> i) & 1)
			printf("*");
		else
			printf("+");
	}


	return 0;
}