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1a l3.1a

#print The editor accepts commands one per line, just like the other programs in UNIX; but its commands are unique to it. Like the normal command interpreter, the editor has a prompt sign to let you k
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1b l32.1b

#print Note that the substitute command changes the first instance of something that matches. Consider the line now is the time for all good men and the substitute command s/tim/TIM/ applied to
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2c l18.2c

#print Again, remembering that "5i" is the same as "4a" what command is the same as .-1a to the editor? Respond "answer XX" where XX is that command. #copyin #user #uncopyin #match i #match .i #log
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2a l14.2a

#print You can also use the "=" command to find out what the 'current' line is. Since the current line is named '.', the appropriate command is .= and so if you say 3p .= the second command
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2c l15.2c

#print Note that every set of lines to be appended ends with the character '.' alone on a line. This is essential to get back to editor command level. Whenever you have been appending, and you later
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3b l18.3b

#print Remembering that 'i' inserts one line before the 'a' command, so that after 3a the first input line is number 4 while after 3i the first input line is number 3, what command using 'i' is t
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1a l14.1a

#print You can also use the "=" command to find out what the 'current' line is. Since the current line is referred to as '.', do you see that .= is the appropriate command to print the current line
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2c l16.2c

#print You can see that the 'a' command adds lines after the line addressed. So if you type 2a at the editor, what will be the line number of the first line that you added? Type "answer N" where N
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1a l45.1a

#print There is one last class of substitutions that you should know about: converting one line into two or more by substituting a newline into the middle. Suppose you want to split the line Now
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01b l20.01b

#print The undo command actually "undoes" the effects of the last command that changed something. So, though it is often used to recover deleted lines, it can also be used to remove lines you just app
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