Using only a single page of paper above it or not, it is also available on paper but did not see the value or the benefits of it can be reused. Thus make use joint paper, not worth it.
Using only a single page of paper, and leave the paper or not, can also be used, but not all of it helpful or esteem, that can be reused. It makes use of paper money.
By using a single paper for certainty or not leave the paper can also be used again since it was not seeing the values or benefits of it and that it can be used to do so, use new paper is not good value for money.