C (copy) Command

C[number-of-lines]: Use the C (copy) line command to copy one line or block of lines. The B (before) and A (after) line commands are used to specify the destination of the line or block to be copied. No other line commands can be entered on the lines to be copied.
number-of-lines: specifies the number of lines to be copied. The default is 1.
C: Specifies a single line to be copied.
Cn: Specifies the first of n lines to be copied.
CC...CC: Specifies the first and last lines of a block of lines to be copied.

Rules for Using the Copy Line Command

When using the C number-of-lines or the CC form of the command, you cannot enter any other commands on the lines being copied.

Each CC must be paired with another CC.
You must pair a B (before) or an A (after) line command with every C or pair of CC commands.