input = open('DATA2.txt', 'r')
output = open('OUT2.txt', 'w')
x = 0
number_output = 0
random_integer1 = 0
random_integer2 = 0
random_integer3 = 0
random_integer4 = 0
random_integer5 = 0
transactions = input.readlines()
transaction1 = transactions[0]
transaction2 = transactions[1]
transaction3 = transactions[2]
transaction4 = transactions[3]
transaction5 = transactions[4]
for x in range(len(transaction1)):
	if transaction1[x] == '+':
		number_output+=1
	if transaction1[x] == '-':
		number_output-=1
	if number_output < 0:
		number_output = 0
		output.writelines('OH NOES!\n')
		random_integer1 = 1
		break
if random_integer1 != 1:
	output.writelines('%s\n' % number_output)
for x in range(len(transaction2)):
	if transaction2[x] == '+':
		number_output+=1
	if transaction2[x] == '-':
		number_output-=1
	if number_output < 0:
		number_output = 0
		output.writelines('OH NOES!\n')
		random_integer2 = 1
		break
if random_integer2 != 1:
	output.writelines('%s\n' % number_output)
for x in range(len(transaction3)):
	if transaction3[x] == '+':
		number_output+=1
	if transaction3[x] == '-':
		number_output-=1
	if number_output < 0:
		output.writelines('OH NOES!\n')
		random_integer3 = 1
		number_output = 0
		break
if random_integer3 != 1:
	output.writelines('%s\n' % number_output)
for x in range(len(transaction4)):
	if transaction4[x] == '+':
		number_output+=1
	if transaction4[x] == '-':
		number_output-=1
	if number_output < 0:
		number_output = 0
		output.writelines('OH NOES!\n')
		random_integer4 = 1
		break
if random_integer4 != 1:
	output.writelines('%s\n' % number_output)
for x in range(len(transaction5)):
	if transaction5[x] == '+':
		number_output+=1
	if transaction5[x] == '-':
		number_output-=1
	if number_output < 0:
		number_output = 0
		output.writelines('OH NOES!\n')
		random_integer5 = 1
		break
if random_integer5 != 1:
	output.writelines('%s\n' % number_output)		 
output.close()