String \textbf{file }contains the file name. You must rename it to match the string \textbf{pattern} that can contain the joker symbol ‘?’ (any one symbol) using the minimal number of moves. A move is defined as adding a character, deleting a character, or modifying a character from the filename. \InputFile Each line contains two strings \textbf{file} and \textbf{pattern} of length no more than \textbf{50}. Each character in \textbf{file} is a lowercase letter ('a' - 'z'). Each character in \textbf{pattern} is a lowercase letter ('a' - 'z') or '?'. \OutputFile For each pair of strings print in a separate line the minimal number of moves that transform \textbf{file} to \textbf{pattern}.