human
Sort a string lexicographically by reversing a substring | Function to find the substring in S required to be reversed.
Stores the size of the string.
Stores the starting point of the substring.
Iterate over the string S while i < N.
Increment the value of i.
Stores the ending index of the substring.
If start <= 0 or i >= N.
If start >= 1 and i <= N.
Return the boolean value.
If start >= 1.
Return the boolean value.
If i < N.
Return true if S [ start ] is less than or equal to S [ i ].
Otherwise.
Function to check if it is possible to sort the string or not.
global start , end , i Stores the starting and the ending index of substring.
Stores whether it is possible to sort the substring.
Traverse the range [ 1 , N ].
If S [ i ] is less than S [ i - 1 ].
If flag stores true.
If adjust ( S , i , start , end ) return false.
Pr - 1.
Unset the flag.
Otherwise.
Pr - 1.
If start is equal to - 1.
Update start and end.
Print the value of start and end.
Driver Code"
Solution in Python:

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What is a code to sort a string lexicographically by reversing a substring and the other steps required?
assistant
#Here is code to sort a string lexicographically by reversing a substring and the other steps required.
 def adjust ( S , i , start , end ) :
	N = len ( S )
	start = i - 1
	while ( i < N and S [ i ] < S [ i - 1 ] ) :
		i += 1
	end = i - 1
	if ( start <= 0 and i >= N ) :
		return True , start , i , end
	if ( start >= 1 and i <= N ) :
		return ( S [ end ] >= S [ start - 1 ] and S [ start ] <= S [ i ] ) , start , i , end
	if ( start >= 1 ) :
		return ( S [ end ] >= S [ start - 1 ] ) , start , i , end
	if ( i < N ) :
		return ( S [ start ] <= S [ i ] ) , start , i , end
	return False , start , i , end
def isPossible ( S , N ) :
	start , end = - 1 , - 1
	flag = True
	i = 1
	while i < N :
		if ( S [ i ] < S [ i - 1 ] ) :
			if ( flag ) :
				f , start , i , end = adjust ( S , i , start , end )
				if ( f == False ) :
					print ( - 1 )
					return
				flag = False
			else :
				print ( - 1 )
				return
		i += 1
	if ( start == - 1 ) :
		start , end = 1 , 1
	print ( start , end )
if __name__ == ' _ _ main _ _ ' :
	S = " abcyxuz "
	N = len ( S )
	isPossible ( S , N )