You have been given a column title as appears in an Excel sheet, return its corresponding column number.
For example:A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
...
1 <= |S| <= 10
Input contains only uppercase English Alphabet letters
Time Limit : 1 sec
Output Format
The only line of output will print the column number corresponding to given column title
AB
Sample Output 1
28
Sample Input 2
ZZZ
Sample Output 2
18278