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
								
		for i, row in enumerate(field):
			if set(row) != c:
				char = list(c - set(row))[0]
				wrong_char = list(set(row) - c)[0]
				print(i+1, row.index(wrong_char)+1, char)
				break
				
		
except EOFError:
	pass