upper lower alpha alnum digit print space cntrl 
'\b'                                                  X     
'\t'                                            X     X     
' '                                       X     X           
'0'                           X     X     X                 
'a'               X     X     X           X                 
'A'         X           X     X           X                 
'\DEL'                                                X     
'\187'                                    X                 
'\913'      X           X     X           X                 
'\2534'                       X           X                 
'\8194'                                   X     X           
'\66352'                X     X           X                 
'\120822'                     X           X