ref: a3b2adffd9eeb3d15e54cfcba7b1f1097ade002d dir: /test/data/stdsort-expected/
0 1 2 3 4 5 6 7 8 9 --- 1 2 3 4 5 6 7 8 9 10 --- C Cc a aa b cC d f fuckit go