try:
	while True:
		size = int(input())
		field = []
		for i in range(size):
			field.append(input())
			
		c1, c2, c3 = set(field[0]), set(field[1]), set(field[2])
		if c1 == c2:
			c = c1
		elif c1 == c3:
			c = c1
		else:
			c = c2
		
		rev_field = list(zip(*field))
								
		for i, row in enumerate(field):
			if set(row) != c:
				if len(set(row)) == len(c):
					char = list(c - set(row))[0]
					wrong_char = list(set(row) - c)[0]
					print(i+1, row.index(wrong_char)+1, char)
					break
				else:
					char = list(c - set(row))[0]
					for j, rowchar in enumerate(row):
						if row.count(rowchar) == rev_field[j].count(rowchar) == 2:
							print(i+1, j+1, list(c - set(row))[0])
					break
				
		
except EOFError:
	pass