If you put forward slashes between answers in Step 2 they'll appear as different lines in Step 3. And this overrules the 10 maximum AND recognises official typeins!
For example, putting "Hawaii / Florida / Alaska / Canada" in an answer box in Step 2 will result in 4 auto-generated rows (with their recognised typeins) in Step 3. Then if you switch that type-in to custom, you can then change the text in Step 2 however you like (changing slashes to commas, removing excess words etc...).
Also you can even use this method to get more typein boxes, then switch to Custom and just change everything, it'll hold the extra boxes.
Finally, you can use a tactic Scambigol used in the "by borders" quizzes where if you put a "|" at the end of a typein, it counts as a logical OR. meaning you can concatenate multiple typeins. E.g. "^FLORIDA|^MIS+IS+IP+I|^ALASKA" is identical to having those three on separate lines.