# [LeetCode]1374. Generate a String With Characters That Have Odd Counts

**Environment: Python 3.7**

**Key technique:** append.

Given an integer `n`

, *return a string with **n** characters such that each character in such string occurs *** an odd number of times**.

The returned string must contain only lowercase English letters. If there are multiples valid strings, return **any** of them.

**Example 1:**

**Input:** n = 4

**Output:** "pppz"

**Analysis:**

- If n is even, add “a” to n-1 location and add “b” in last location.
- if n is odd , add “a” in all location.

**Solution:**

`class Solution:`

def generateTheString(self, n):

ans=[]

if n%2==0:

for i in range(n-1):

ans.append('a')

ans.append('b')

else:

for i in range(n):

ans.append('a')

return ans

**Improved Solution:**

`class Solution:`

def generateTheString(self, n):

ans=[]

if n%2==0:

ans=['a' for i in range(n-1)]

ans.append('b')

else:

ans=['a' for i in range(n)]

return ans

**Submission:**

**Improved Submission:**