Using the Twitter option (only three lines), there are 6,128,487 possible lyrical combinations. Even the shortest full-length song (fifteen lines) could generate 8,645,026,840,022,332,995,395,319,797,571,207 (8.6 decillion) combinations. It's an astronomical (but countable, non-infinite) number. If a computer could generate 1,000 combinations per second, it would take that computer 274,132,002,791,170,000,000,000 years to generate all those combinations.