lexer
.....\Lexer.class
.....\Lexer.java
.....\Main.class
.....\Main.java
.....\Num.class
.....\Num.java
.....\Real.class
.....\Real.java
.....\Tag.class
.....\Tag.java
.....\test.txt
.....\test.txt~
.....\Token.class
.....\Token.java
.....\Type.class
.....\Type.java
.....\Word.class
.....\Word.java