$ pm_number_mask.pl
541321069873210200
541321XXXXXXXX0200
5413 21069873210 200
5413 21XXXXXXXX0 200
54 13-21XX XXXXXX02#00
54 13-21XX XXXXXX02#00
1!2@3#4$5%6^7&8*9(0)-0_9+8=7{6}5[4]3<2>1
1!2@3#4$5%6^X&X*X(X)-X_X+X=X{X}X[4]3<2>1