6
44 a b ab c ac bc abcdf d ad bd abd cd acd bcd abcd e bcef be abe acef def bce abdef bef ade bde abde cde acde ef bdef f abcdef bf abf cf adef bcf abcf df adf bcdef bcdf acdf
17 a b acdf abdf ac bc bde d abcde bcde f ef af abce abcd abef abde
5 abcdef e ade def bcde
25 abcdef bcdf ab c ac adef abcf d bcef abdf abd af acd acdef abcd aef cdef be abde ce bcdef bce f acf acef
11 a abcef cdf abf bcdf bef abc adef e bd be
39 a abcdef ab c ac bc abdef d ad bd cdf cd abcdf df bcef e ae acdef abe ce ace bce bcdf de cef abef acdf cde acde bcde abcde f af aef abf cf bdf bcf abcf
