Adapter

Adapter wraps an incompatible interface so it matches the one your code
expects, without touching the original class.

LegacyPrinter.old_print(text) is what you have. Your code expects a
ModernPrinter-shaped .print_text(text). Implement
LegacyPrinterAdapter to bridge the two.

solve(texts) prints every text through the adapter and returns the results.