#Insert before the cursor
i
#Insert at the beginning of the line
I
#Insert ( append ) after the cursor
a
#Insert ( append ) at the end of the line
A
#Append ( Open ) a new line below the current line
o
#Append ( open ) a new line above the current line
O
#Insert ( append ) at the end of the word
ea
#Exit from insert mode
Esc
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