In most spreadsheet programs, columns go
Z. After this comes
BA and so on.
Your task is to convert one of these strings in to a column number. You must support inputs up to the maximum length of your language, to a minimum of 3.
A => 1 B => 2 Z => 26 AA => 27 AC => 29 AZ => 52 BA => 53 FC => 159 ID => 238 AAA => 703
Standard loopholes are forbidden.