#include<stdio.h>

typedef unsigned short ushort;

void numin(ushort index, ushort *numBox) {
	char str;
	for (ushort i = 0; i<index; i++)
		numBox[i] = 0;
	ushort 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 + (ushort)str - (ushort)'0';
	}
}


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

	scanf("%hu", &number);
	scanf("%hu", &total);

	numin(number, value);

	ushort ans = value[0];
	ushort cnt = 2;
	unsigned long long switcher = 0;

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

		if (cnt < number - 2) {
			cnt++;
		}else{
			if (ans == total)
				break;
			else {
				ans = value[0];
				cnt = 0;
				switcher++;
				continue;
			}
		}
	}
	
	for (int i = 0; i < number - 1; i++) {
		if((switcher >> i) & 1)
			printf("*");
		else
			printf("+");
	}


	return 0;
}