test1.in   1   0 ident      'a'
test1.in   1   2 ident      'b'
test1.in   1   4 ident      'aa'
test1.in   1   7 ident      'ab'
test1.in   1  10 ident      'ba'
test1.in   1  13 ident      'a0'
test1.in   1  16 ident      'a1'
test1.in   1  19 ident      'b0'
test1.in   1  22 ident      'b1'
test1.in   1  25 ident      'ab01'
test1.in   2   0 ident      'babba01'
test1.in   2   8 ident      'abba'
test1.in   2  13 ident      'babb'
test1.in   2  18 ident      'b0001a'
test1.in   4   0 None       ''
