def palindrome(a):
	
	mid = (len(a)-1)//2	 
	start = 0			
	last = len(a)-1
	flag = 0
	
	while(start <= mid):

		
		
		if (a[start]== a[last]):
			
			start += 1
			last -= 1
			
		else:
			flag = 1
			break;
				
	if flag == 0:
		print("palindrome")
	else:
		print("not palindrome")
		
	
def symmetry(a):
	
	n = len(a)
	flag = 0
		
	if n%2:
		mid = n//2 +1
	else:
		mid = n//2
		
	start1 = 0
	start2 = mid
	
	while(start1 < mid and start2 < n):
		
		if (a[start1]== a[start2]):
			start1 = start1 + 1
			start2 = start2 + 1
		else:
			flag = 1
			break
		
	if flag == 0:
		print("symmetrical")
	else:
		print("not symmetrical")
		

string = 'bob'
palindrome(string)
symmetry(string)