How to write 20 words on the Xuan paper of calligraphy 135*35?

Vertical, two lines of content, each line 12, each line 10* 10 cm, so there is a margin of 7.5 cm up and down, and the third line, the inscription line on the left, is 8 cm or 7 cm wide (the inscription is slightly smaller), which is used for writing inscriptions, so that a margin of 3.5 cm or 4 cm can be left and right. Write 20 of the 24 boxes in the second row, and the remaining 4 boxes are empty. The signature line can have more words. For reference only.