1
& 0
 1
^ 123
 10
^ 218
& 150
| 935
& 61
| 588
& 897
| 411
| 584
^ 800
| 704
 3
& 1
& 3
& 5
 1
| 123
 1
^ 0
 1
| 1023
 3
& 242
^ 506
^ 522
 10
^ 160
& 1021
& 510
^ 470
& 1022
& 251
& 760
& 1016
| 772
| 515
 1
& 1023
 1
| 0
 2
| 56
^ 875
 1
^ 1023
 2
| 999
^ 689
 3
^ 125
^ 377
& 1019
 1
& 123

3
& 0
| 0
^ 0
 3
& 1023
| 0
^ 123
 3
& 763
| 763
^ 0
 3
& 1
| 0
^ 0
 3
& 1023
| 123
^ 0
 3
& 1023
| 0
^ 0
 3
& 1023
| 1023
^ 0
 3
& 1010
| 768
^ 240
 2
| 775
^ 112
 3
& 1023
| 0
^ 0
 3
& 1023
| 0
^ 0
 3
& 983
| 16
^ 835
 3
& 1023
| 0
^ 1023
 3
& 350
| 326
^ 16
 3
& 1019
| 0
^ 256
 3
& 123
| 0
^ 0

n = int(input())

lst = []

prior = {
	'&': 4,
	'|': 2,
	'^': 1
}

toprior = {
	4: '&',
	2: '|',
	1: '^'
}

for i in range(n):
	com, x = input().split()
	if i == 0:
		lst.append([prior[com], int(x)])
	else:
		if prior[com] > lst[-1][0]:
			lst.insert(-1, [prior[com], int(x)])
		else:
			lst.append([prior[com], int(x)])

lst2 = []
lst2.append(lst[0])
for i in range(1, n):
	if lst2[-1][0] == lst[i][0]:
		if lst2[-1][0] == 1:
			lst2[-1][1] ^= lst[i][1]
		elif lst2[-1][0] == 2:
			lst2[-1][1] |= lst[i][1]
		elif lst2[-1][0] == 4:
			lst2[-1][1] &= lst[i][1]
	else:
		lst2.append(lst[i])
if len(lst2) == 1 and (lst2[0][0] in [0, 4]) and lst2[0][1] == 0:
	print(0)
else:
	print(len(lst2))
	for com, x in lst2:
		print(toprior[com] + ' ' + str(x))
