Rearrange a string
Easy Accuracy: 70.41% Submissions: 1772 Points: 2

Given a string containing uppercase alphabets and integer digits (from 0 to 9), the task is to print the alphabets in the lexicographical order followed by the sum of digits.

Example 1:

Input: S = "AC2BEW3"
Output: "ABCEW5"
Explanation: 2 + 3 = 5 and we print all
alphabets in the lexicographical order. 

Example 2:

Input: S = "ACCBA10D2EW30"
Output: "AABCCDEW6"
Explanation: 0+1+2+3 = 6 and we print all
alphabets in the lexicographical order. 


Your Task:  
You don't need to read input or print anything. Your task is to complete the function arrangeString() which takes the string as inputs and returns the modified string.

Expected Time Complexity: O(|S|)
Expected Auxiliary Space: O(26)

Constraints:
1 ≤ |S| ≤ 105
S contains only upper case alphabets and digits.

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Rearrange a string

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