Strange Compressed Loop

You have a simple, line-oriented “compression” language. The language works as follows:

• The document must start with the begin keyword and end with the end keyword.
• There are two possible commands, each identified with a single letter followed by one or two non-negative integer arguments. These are as follows:
• Literal: l n — The n lines that follow this command are added to the output as is. The next command comes after that.
• Repeat: r n k — The k lines of the output which start at the nth line from the current end of the output are repeated. Note, that if k > n, then some of the repeated lines will be the lines that were added by this command itself.

Your goal is to create a valid “compressed” document for which the output is identical to the input. Write the compressed document on the left, see the result on the right.