statement :: Parser Statement
statement =   skip
          <|> conditional 
          <|> while
          <|> assign
          <|> tryCatch
          <|> parens statements
statement :: Parser Statement
statement =   skip
          <|> conditional 
          <|> while
          <|> assign
          <|> tryCatch
          <|> parens statements
statement =   skip
          <|> conditional 
          <|> while
          <|> assign
          <|> tryCatch
          <|> parens statements