Vim and Vigor

Most text editors just give you somewhere to type so that keys you press appear on the screen. Vim is different in that it provides <<modal>> editing: what a key does depends on which mode you're in. In {{Insert}} mode, everything's pretty straightforward: typed keys simply appear in the buffer at the current cursor position. In {{Normal}} mode, however, keys will instead perform various actions rather than inserting text. There are hundreds of Vim commands, but for this problem we'll use just four, all of which simply enter Insert mode at different locations: {{I}}: at the beginning of the line {{A}}: at the end of the line ({{A}}ppend) {{i}}: to the <<left>> of the character under the cursor {{a}}: to the <<right>> of the character under the cursor Consider the following line, highlighted to indicate that we're in Normal mode and our cursor is over the [[d]]: abc[[d]]efg This diagram shows where each of the commands places the cursor after entering Insert mode: ` a b c d e f g I i a A` Of course, we need a way to not get trapped in Insert mode: for this problem, {{^E}} will be used to represent the Escape key, which returns to Normal mode and places the cursor over the character to the left. abcd|efg -> abc[[d]]efg ‒‒‒‒‒‒‒‒‒‒ Given two lines of text, apply the second as a series of Vim keystrokes to the first and print the resulting line. <<Note>> that we always start in Normal mode with the cursor over the first character in the line.