Liner / pen

Even though, a lot of people do not write very well, there are many moments when they need to write correctly.
In particular,there are difficulties in writing personal information in some parts without lines.
Even if it looks simple work for writing document, it should be difficult for people who is handwriting to write correctly.
For instance, mailman may have trouble with recognizing its address if its gap of word or letter in document is not straight.
"LINER" sets gap in up and down of letters regularly and help user write straightly.