Excel Column Number

In Progress Easy

In Excel, columns are labeled as $A,B,$Cdots..$Z,$ then $AA,AB,$ACdots..$AZ,$

BA$,$ B$8....$BZ and so forth.

The corresponding numerical values for these labels are as follows:

$A1$

$B2$

$B$

$B$

$Z26$

$AA27$

$AB28$

Your task is to write a program that takes a string inpul representing

the column labet in uppercase letters and returns the corresponding

coturnintintion

Input:

The fisaline at input is a string that represents the column label in

uppercase letters.

utput: