Create 171.Excel Sheet Column Number 

Excel Sheet Column Number Total Accepted: 411 Total Submissions: 860 My Submissions Question Solution 
Related to question Excel Sheet Column Title

Given a column title as appear in an Excel sheet, return its corresponding column number.

For example:

    A -> 1
    B -> 2
    C -> 3
    ...
    Z -> 26
    AA -> 27
    AB -> 28