Could someone tell me it's command

This is the current line within vi - the cursor is shown in green NOTE THE FOLLOWING, which is the same for each question: 1. Type the shortest sequence of vi commands (keystrokes) required. 2. You are in command mode, and you are to remain in command mode. 3. The questions are independent, with no relationship to each other. 4. Indicate the ENTER and ESC keys when required. 5. Use only the commands: a, A, b, B, cw, cs, cc, dw, ds, dd, g, h, i, I, j, j, k, l, n, o, o, p, P, r, R, W, W, X, yw, y$, yy, ., 0, $, I, ? Example question: Replace line 2000 with the string "LineMM" Sample answer: 2000GccLineMMESC Create a new line containing the word "Next" under the current line