../preliminary/01    Sample test 'abba'
../tests/subtask1/01 Just ab
../tests/subtask1/02 Just a
../tests/subtask1/03 Just b
../tests/subtask1/04 Test contains 50 letters 'a'
../tests/subtask1/05 Test contains 50 letters 'b'
../tests/subtask1/06 Test contains 25 concatenated strings 'ab'
../tests/subtask1/07 Easy stairs from left up to right down with len = 36
../tests/subtask1/08 Easy stairs from left down to right up with len = 36
../tests/subtask1/09 Permutation of length with len = 30
../tests/subtask1/10 Random sequence of a and b with len = 50
../tests/subtask1/11 Random sequence of a and b with len = 50
../tests/subtask1/12 Random sequence of a and b with len = 50
../tests/subtask1/13 a repeats about n/2 times, then b repeats about n/2 times, len = 50
../tests/subtask2/14 Random sequence of all letters with len = 50
../tests/subtask2/15 Random sequence of all letters with len = 50
../tests/subtask2/16 Random sequence of all letters with len = 50
../tests/subtask2/17 Random sequence of letters from string "abc" with len = 50
../tests/subtask2/18 Random sequence of letters from string "xyz" with len = 50
../tests/subtask2/19 Random sequence of letters from string "agz" with len = 50
../tests/subtask2/20 Random sequence of letters from string "zga" with len = 50
../tests/subtask2/21 Random sequence of letters from string "abc" with len = 50
../tests/subtask2/22 Random sequence of letters from string "xyz" with len = 50
../tests/subtask2/23 Random sequence of letters from string "agz" with len = 50
../tests/subtask2/24 Random sequence of letters from string "zga" with len = 50
../tests/subtask2/25 Random sequence of letters from string "akrbc" with len = 50
../tests/subtask2/26 Random sequence of letters from string "xyhez" with len = 50
../tests/subtask2/27 Random sequence of letters from string "agdlz" with len = 50
../tests/subtask2/28 Random sequence of letters from string "zlmrvga" with len = 50
../tests/subtask2/29 a repeats about n/2 times, then b repeats about n/2 times, len = 50
../tests/subtask2/30 a repeats about n/2 times, then b repeats about n/2 times, len = 50
../tests/subtask2/31 a repeats about n/2 times, then b repeats about n/2 times, len = 50
../tests/subtask2/32 one symbol at the start and at the end, in middle a repeats n/2 times, then b repeats n/2 times, len = 50
../tests/subtask3/33 Random sequence of all letters with len = 1000
../tests/subtask3/34 Random sequence of all letters with len = 1000
../tests/subtask3/35 Random sequence of all letters with len = 1000
../tests/subtask3/36 Random sequence of all letters with len = 1000
../tests/subtask3/37 Random sequence of all letters with len = 1000
../tests/subtask3/38 Random sequence of all letters with len = 1000
../tests/subtask3/39 a repeats about n/2 times, then b repeats about n/2 times, len = 1000
../tests/subtask3/40 a repeats about n/2 times, then b repeats about n/2 times, len = 1000
../tests/subtask3/41 a repeats about n/2 times, then b repeats about n/2 times, len = 1000
../tests/subtask3/42 a repeats about n/2 times, then b repeats about n/2 times, len = 1000
../tests/subtask3/43 one symbol at the start and at the end, in middle a repeats n/2 times, then b repeats n/2 times, len = 1000
../tests/subtask3/44 all combinations len = 1000
../tests/subtask3/45 all combinations len = 1000
../tests/subtask3/46 all combinations len = 1000
../tests/subtask3/47 all combinations len = 1000
../tests/subtask4/48 Random sequence of all letters with len = 200000
../tests/subtask4/49 Random sequence of all letters with len = 200000
../tests/subtask4/50 Random sequence of all letters with len = 200000
../tests/subtask4/51 Random sequence of all letters with len = 200000
../tests/subtask4/52 a repeats about n/2 times, then b repeats about n/2 times, len = 200000
../tests/subtask4/53 a repeats about n/2 times, then b repeats about n/2 times, len = 200000
../tests/subtask4/54 a repeats about n/2 times, then b repeats about n/2 times, len = 200000
../tests/subtask4/55 one symbol at the start and at the end, in middle a repeats n/2 times, then b repeats n/2 times, len = 200000
../tests/subtask4/56 all combinations len = 650
../tests/subtask4/57 all combinations len = 200000
../tests/subtask4/58 all combinations len = 200000
../tests/subtask4/59 all combinations len = 200000
../tests/subtask4/60 all combinations len = 200000
../tests/subtask4/61 all combinations len = 200000
